ARM: only emit EABI attributes on EABI targets

EABI attributes should only be emitted on EABI targets.  This prevents the
emission of the optimization goals EABI attribute on Windows ARM.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255448 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed