updated changes.md for release #1244

Job	Run time
build (gcc)	1m 46s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	2m 11s
build (gcc, --disable-shared)	1m 44s
build (gcc, --disable-xft)	1m 52s
test (gcc)	4m 37s
build (gcc, --disable-xss)	1m 53s
test (gcc, --disable-xft)	4m 9s
build (gcc, --enable-symbols)	1m 15s
build (clang)	1m 50s
test (gcc, --enable-symbols)	4m 26s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 50s
build (clang, --disable-shared)	1m 51s
build (clang, --disable-xft)	1m 55s
build (clang, --disable-xss)	1m 47s
build (clang, --enable-symbols)	1m 25s
	34m 31s

Provide feedback