[AArch64] Fix frame tests

[AArch64] Fix frame tests

Improve the AArch64 frame tests - add -f(no-)omit-frame-pointer,
update checks and add missing tests.  As a result all tests now
pass.

    gcc/testsuite/
	* gcc.target/aarch64/lr_free_2.c: Fix test.
	* gcc.target/aarch64/spill_1.c: Likewise.
	* gcc.target/aarch64/test_frame_11.c: Likewise.
	* gcc.target/aarch64/test_frame_12.c: Likewise.
	* gcc.target/aarch64/test_frame_13.c: Likewise.
	* gcc.target/aarch64/test_frame_14.c: Likewise.
	* gcc.target/aarch64/test_frame_15.c: Likewise.
	* gcc.target/aarch64/test_frame_3.c: Likewise.
	* gcc.target/aarch64/test_frame_5.c: Likewise.
	* gcc.target/aarch64/test_frame_9.c: Likewise.

From-SVN: r254814