Linux

Make Ttk_ManagerSpec "const" #2851

Job	Run time
build (gcc)	5m 7s
test (gcc)	3m 46s
build (gcc, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 37s
test (gcc, --disable-xft)	4m 41s
build (gcc, --disable-shared)	1m 37s
test (gcc, --enable-symbols)	3m 17s
build (gcc, --disable-xft)	1m 38s
build (gcc, --disable-xss)	1m 59s
build (gcc, --enable-symbols)	1m 13s
build (clang)	1m 49s
build (clang, CFLAGS=-DTK_NO_DEPRECATED=1)	1m 52s
build (clang, --disable-shared)	1m 48s
build (clang, --disable-xft)	1m 50s
build (clang, --disable-xss)	2m 13s
build (clang, --enable-symbols)	1m 30s
	35m 57s

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