xxd color patch #363

Job	Run time
windows (HUGE, msvc, no, no, x64, stable)	7m 57s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	15m 10s
windows (HUGE, msvc, no, yes, x86)	12m 29s
windows (HUGE, mingw, yes, no, x64, yes)	10m 39s
windows (NORMAL, msvc, yes, no, x86)	5m 24s
windows (NORMAL, mingw, no, yes, x64)	12m 13s
windows (TINY, msvc, yes, yes, x64)	4m 52s
windows (TINY, mingw, no, no, x86)	3m 6s
macos (tiny)	1m 31s
macos (normal)	7m 30s
macos (huge)	16m 42s
linux (tiny, clang)	2m 40s
linux (tiny, gcc)	1m 45s
linux (normal, clang)	8m 10s
linux (normal, gcc)	9m 35s
linux (huge, clang)	8m 38s
linux (huge, gcc)	14m 46s
linux (tiny, clang, nogui)	1m 34s
linux (tiny, gcc, nogui)	1m 29s
linux (huge, gcc, uchar, testgui, true, dynamic)	11m 41s
linux (huge, clang, asan, 5.1)	21m 18s
linux (huge, gcc, unittests, true)	2m 17s
linux (normal, gcc, vimtags)	2m 14s
	3h 3m 40s

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