TIP 624 followup. Now TclMakeSafe can be a static routine. #3837

Job	Run time
gcc	14m 7s
gcc (CFLAGS=-DTCL_NO_DEPRECATED=1)	12m 21s
gcc (--disable-shared)	15m 19s
gcc (--enable-symbols)	14m 17s
gcc (--enable-symbols=mem)	16m 12s
gcc (--enable-symbols=all)	13m 41s
msvc	12m 24s
msvc (CHECKS=nodep)	10m 49s
msvc (OPTS=static)	14m 50s
msvc (OPTS=symbols)	11m 13s
msvc (OPTS=symbols STATS=compdbg,memdbg)	11m 55s
	2h 27m 8s

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