{lib}mediainfo{-gui}: 0.7.76 -> 0.7.77, fixes #9617

Local build and run successful.

From the ChangeLog:
```
Version 0.7.77, 2015-09-02

+ #B941, MXF: files having only a video stream and an ancillary data
  stream were having incorrect second video stream
+ MOV: detection of r210 CodecID as raw RGB
+ Ancillary data: detection of all metadata blocks (previously: only the
  first one was detected)
x MPEG-TS: Wrong demux of TSP (188+16 TS) files having PES with only
  padding x MediaTrace #2: XML malformed with Flags items (hotfix, flags
  meaning disabled in XML output)
x MediaTrace #3: XML malformed with some MP4 files
x MediaTrace #6: XML duplicated attributes
x MediaTrace #10: versioned xsd, creating library name and version
x MediaTrace: XML content was not escaped
x #B947, Amazon S3 support (REST API v2), CLI/DLL only and if compiled
  with libcurl support: Analyze file on s3 was not working if secret key
  contains / character
```