Fix a big-endian failure reported by Christophe. Also tighten the
test so that it doesn't allow saving and restoring 128-bit vectors
as Q registers.
2019-10-04 Richard Sandiford <richard.sandiford@arm.com>
gcc/testsuite/
* gcc.target/aarch64/torture/simd-abi-8.c: Use -mlittle-endian.
Check that there are no Q register saves or restores.
From-SVN: r276577
