chromium: fix build on aarch64

chromium build on aarch64 failed with:
```
FAILED: obj/skia/skia/convolver_neon.o
g++ -MMD -MF obj/skia/skia/convolver_neon.o.d -DV8_DEPRECATION_WARNINGS -DUSE_UDEV -DUSE_AURA=1 -DUSE_GLIB=1 -DUSE_NSS_CERTS=1 -DUSE_X11=1 -DNO_TCMALLOC -DFULL_SAFE_BROWSING -DSAFE_BROWSING_CSD -DSAFE_BROWSING_DB_LOCAL -DCHROMIUM_BUILD -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DSK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS -DSK_HAS_PNG_LIBRARY -DSK_HAS_WEBP_LIBRARY -DSK_HAS_JPEG_LIBRARY -DSK_SUPPORT_GPU=1 -DSK_FREETYPE_MINIMUM_RUNTIME_VERSION=\(\(\(FREETYPE_MAJOR\)\ \*\ 0x01000000\)\ \|\ \(\(FREETYPE_MINOR\)\ \*\ 0x00010000\)\ \|\ \(\(FREETYPE_PATCH\)\ \*\ 0x00000100\)\) -DSK_GAMMA_EXPONENT=1.2 -DSK_GAMMA_CONTRAST=0.2 -DSK_DEFAULT_FONT_CACHE_LIMIT=20971520 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_32 -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DFT_CONFIG_CONFIG_H=\"freetype-custom-config/ftconfig.h\" -DFT_CONFIG_MODULES_H=\"freetype-custom-config/ftmodule.h\" -DFT_CONFIG_OPTIONS_H=\"freetype-custom-config/ftoption.h\" -DPDFIUM_REQUIRED_MODULES -DCHROMIUM_RESTRICT_VISIBILITY -DUSE_LIBJPEG_TURBO=1 -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -DUSE_SYSTEM_ZLIB=1 -I../.. -Igen -I../../skia/config -I../../skia/ext -I../../third_party/skia/include/c -I../../third_party/skia/include/config -I../../third_party/skia/include/core -I../../third_party/skia/include/effects -I../../third_party/skia/include/encode -I../../third_party/skia/include/gpu -I../../third_party/skia/include/images -I../../third_party/skia/include/lazy -I../../third_party/skia/include/pathops -I../../third_party/skia/include/pdf -I../../third_party/skia/include/pipe -I../../third_party/skia/include/ports -I../../third_party/skia/include/utils -I../../third_party/skia/src/gpu -I../../third_party/skia/src/sksl -I../../third_party/skia/include/codec -I../../third_party/skia/include/private -I../../third_party/skia/include/client/android -I../../third_party/skia/src/codec -I../../third_party/skia/src/core -I../../third_party/skia/src/image -I../../third_party/skia/src/images -I../../third_party/skia/src/opts -I../../third_party/skia/src/pdf -I../../third_party/skia/src/ports -I../../third_party/skia/src/shaders -I../../third_party/skia/src/shaders/gradients -I../../third_party/skia/src/sfnt -I../../third_party/skia/src/utils -I../../third_party/skia/src/lazy -I../../third_party/skia/third_party/gif -I../../third_party/skia/src/effects/gradients -Igen/shim_headers/libpng_shim -Igen/shim_headers/zlib_shim -I../../third_party/freetype/include -I../../third_party/freetype/src/include -I../../third_party/harfbuzz-ng/src -I../../third_party/libjpeg_turbo -I../../third_party/fontconfig/src -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../third_party/sfntly/src/cpp/src -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -funwind-tables -fPIC -pipe -pthread -fno-omit-frame-pointer -g0 -fno-builtin-abs -fvisibility=hidden -Wno-unused-local-typedefs -Wno-maybe-uninitialized -Wno-deprecated-declarations -fno-delete-null-pointer-checks -Wno-missing-field-initializers -Wno-unused-parameter -O2 -fno-ident -fdata-sections -ffunction-sections -isystem/nix/store/smmxgfkqaqqh43d5gmv5p3abcq19hkzy-glib-2.56.0-dev/include/glib-2.0 -isystem/nix/store/yn3bbw1sxg19h07wzn16k0ja58wr9yiz-glib-2.56.0/lib/glib-2.0/include -isystem/nix/store/f82jgynysk9mvhyfavfzims41zkskb3c-libpng-apng-1.6.34-dev/include/libpng16 -isystem/nix/store/56i89kfi2nmjrv8hifsz6zikr6pq1avw-zlib-1.2.11-dev/include -std=gnu++14 -fno-exceptions -fno-rtti -nostdinc++ -isystem../../buildtools/third_party/libc++/trunk/include -isystem../../buildtools/third_party/libc++abi/trunk/include -fvisibility-inlines-hidden -Wno-narrowing -c ../../skia/ext/convolver_neon.cc -o obj/skia/skia/convolver_neon.o
../../skia/ext/convolver_neon.cc: In function 'int32x4_t skia::AccumRemainder(const unsigned char*, const Fixed*, int)':
../../skia/ext/convolver_neon.cc:26:65: error: cannot convert '<brace-enclosed initializer list>' to 'int32x4_t {aka __vector(4) int}' in return
   return {remainder[0], remainder[1], remainder[2], remainder[3]};
                                                                 ^
```

The following patch appears to fix this build issue.

Source: https://chromium.googlesource.com/chromium/src.git/+/b84682f31dc99b9c90f5a04947075815697c68d9%5E%21/#F0
Suggested-by: @dezgeg