Add a testcase for the erratum mitigation.  To improve coverage
use -dp on the assembler output and match the pattern names (and where
needed the alternative number).

gcc/testsuite/ChangeLog:

	* gcc.target/arm/crypto-vaese-erratum1.c: New test.
---
 .../gcc.target/arm/crypto-vaese-erratum1.c    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/arm/crypto-vaese-erratum1.c