petsc: 3.7.6 -> 3.8.3

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/saws/getSAWs.bash -h` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/saws/getSAWs.bash --help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/saws/getSAWs.bash help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py -h` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py --help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py -V` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py -v` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py --version` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py version` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py -h` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py --help` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/update.py help` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscnagupgrade.py -h` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscnagupgrade.py --help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscnagupgrade.py help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/sendToJenkins -h` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/sendToJenkins --help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/sendToJenkins -h` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/sendToJenkins --help` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscdiff -h` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscdiff --help` got 0 exit code
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscdiff -h` and found version 3.8.3
- ran `/nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3/bin/petscdiff --help` and found version 3.8.3
- found 3.8.3 with grep in /nix/store/fgr3yvhrnvfhr0czc4ygx1mnjsrv4f4i-petsc-3.8.3