[testsuite] [x86] cope with --enable-frame-pointer

[testsuite] [x86] cope with --enable-frame-pointer

Various x86 tests fail if the toolchain is configured with
--enable-frame-pointer, because the unexpected extra insns mess with
the expected asm counts.  Add -fomit-frame-pointer so that they can
still pass.

for  gcc/testsuite/ChangeLog

	* gcc.target/i386/pieces-memcpy-7.c: Add -fomit-frame-pointer.
	* gcc.target/i386/pieces-memcpy-8.c: Likewise.
	* gcc.target/i386/pieces-memcpy-9.c: Likewise.
	* gcc.target/i386/pieces-memset-1.c: Likewise.
	* gcc.target/i386/pieces-memset-36.c: Likewise.
	* gcc.target/i386/pieces-memset-4.c: Likewise.
	* gcc.target/i386/pieces-memset-40.c: Likewise.
	* gcc.target/i386/pieces-memset-41.c: Likewise.
	* gcc.target/i386/pieces-memset-7.c: Likewise.
	* gcc.target/i386/pieces-memset-8.c: Likewise.
	* gcc.target/i386/pieces-memset-9.c: Likewise.
	* gcc.target/i386/pr102230.c: Likewise.
	* gcc.target/i386/pr78103-2.c: Likewise.