* gcc.target/cris/asm-v8.S, gcc.target/cris/inasm-v8.c,
	gcc.target/cris/sync-1.c: Apply effective_target_march_option.

Oops.  A few stragglers, same as recent update: differing
-march=... options is an error, noticed with e.g.
"make check RUNTESTFLAGS=--target_board=cris-sim/arch=v10"