[i386] Fix apx test fails on 32bit target

[i386] Fix apx test fails on 32bit target

Since -mapxf works similar as -muintr that will emit error for 32bit
target, add !ia32 target guard for apx related tests.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/apx-egprs-names.c: Compile for non-ia32.
	* gcc.target/i386/apx-inline-gpr-norex2.c: Likewise.
	* gcc.target/i386/apx-interrupt-1.c: Likewise.
	* gcc.target/i386/apx-legacy-insn-check-norex2-asm.c: Likewise.
	* gcc.target/i386/apx-legacy-insn-check-norex2.c: Likewise.