[5/6] ARM Neon Intrinsic Tablegen Test Generator.

Changed the test generation target cpu type from cortex-a9 to swift.

Reviewed by Bob Wilson.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179642 91177308-0d34-0410-b5e6-96231b3b80d8