Move catchpad-phi-cast.ll to the X86 specific subdirectory

It is X86 specific and will not be properly exercised unless LLVM is
built with the X86 target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@255426 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed