Fixed a bug where certain vector code didn't
work on i386.  Now we let the JIT emit SSE/SSE2
instructions on i386.

<rdar://problem/13240476>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175700 91177308-0d34-0410-b5e6-96231b3b80d8