Build FFmpeg #106

Job	Run time
Pre Checks	1s
Build base image	6m 53s
Build target base image (win64)	2m 22s
Build target base image (win32)	32s
Build target-variant image (win64, gpl)	2m 20s
Build target-variant image (win64, gpl 7.0)	2m 19s
Build target-variant image (win32, gpl)	2m 12s
Build target-variant image (win32, gpl 7.0)	2m 15s
Build ffmpeg (win64, gpl)	8m 50s
Build ffmpeg (win64, gpl 7.0)	9m 54s
Build ffmpeg (win32, gpl)	8m 50s
Build ffmpeg (win32, gpl 7.0)	7m 25s
Publish release	1m 47s
	55m 40s

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