Decided to split the patches up to make it clear that the testisms fixes 
had nothing to do with the TBAA fix. I'll be committing these two separately

First:

[AArch64] Fix big-endian testisms introduced by NEON gimple lowering patch

This patch reverts the tests for big-endian after the NEON gimple lowering
patch.  The earlier patch only lowers NEON loads and stores for 
little-endian,
meaning the codegen now differs between endinanness so we need target 
specific
testing.

gcc/testsuite/ChangeLog:

         * gcc.target/aarch64/fmla_intrinsic_1.c: Fix big-endian testism.
         * gcc.target/aarch64/fmls_intrinsic_1.c: Likewise.
         * gcc.target/aarch64/fmul_intrinsic_1.c: Likewise.