testsuite: fix dg-do ordering wrt dg-require-*

testsuite: fix dg-do ordering wrt dg-require-*

Per gccint, dg-do must precede dg-require-effective-target or
dg-require-support. Fix a handful of deviant cases.

gcc/testsuite/ChangeLog:
	PR middle-end/25521
	PR debug/93122
	* gcc.dg/pr25521.c: Fix dg-do directive order.
	* gcc.dg/vect/vect-simd-clone-19.c: Likewise.
	* gcc.target/arm/stack-protector-7.c: Likewise.
	* gcc.target/arm/stack-protector-8.c: Likewise.
	* gcc.target/powerpc/pr93122.c: Likewise.

libstdc++-v3/ChangeLog:
	PR libstdc++/110572
	* testsuite/18_support/type_info/110572.cc: Fix dg-do directive order.