Extended the file changes.md. #660

Job	Run time
build (gcc)	1m 38s
test (gcc)	4m 9s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 39s
test (gcc, --disable-xft)	4m 20s
build (gcc, --disable-shared)	1m 40s
test (gcc, --enable-symbols)	3m 37s
build (gcc, --disable-xft)	1m 39s
build (gcc, --disable-xss)	1m 40s
build (gcc, --enable-symbols)	1m 11s
build (clang)	2m 12s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 16s
build (clang, --disable-shared)	1m 51s
build (clang, --disable-xft)	2m 1s
build (clang, --disable-xss)	2m 2s
build (clang, --enable-symbols)	1m 47s
	33m 42s

Provide feedback