xxd color patch #360

Job	Run time
macos (tiny)	1m 21s
macos (normal)	15m 3s
macos (huge)	11m 59s
windows (HUGE, msvc, no, no, x64, stable)	9m 15s
windows (HUGE, mingw, yes, yes, x86, stable, yes)	13m 50s
windows (HUGE, msvc, no, yes, x86)	9m 21s
windows (HUGE, mingw, yes, no, x64, yes)	12m 59s
windows (NORMAL, msvc, yes, no, x86)	8m 14s
windows (NORMAL, mingw, no, yes, x64)	12m 41s
windows (TINY, msvc, yes, yes, x64)	2m 23s
windows (TINY, mingw, no, no, x86)	5m 35s
linux (tiny, clang)	2m 19s
linux (tiny, gcc)	2m 24s
linux (normal, clang)	8m 49s
linux (normal, gcc)	8m 39s
linux (huge, clang)	6m 57s
linux (huge, gcc)	11m 59s
linux (tiny, clang, nogui)	1m 32s
linux (tiny, gcc, nogui)	1m 34s
linux (huge, gcc, uchar, testgui, true, dynamic)	10m 33s
linux (huge, clang, asan, 5.1)	24m 20s
linux (huge, gcc, unittests, true)	2m 43s
linux (normal, gcc, vimtags)	2m 2s
	3h 6m 32s

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