Update multiline.ll testcase to handle (ppc64le) .localentry directive

The ppc64le platform will emit a .localentry directive. This is triggering
a false-positive against a CHECK-NOT: .loc in multiline.ll.
Add a space "{{ }}" to the check-not line to allow for arguments, and
prevent .localentry from matching.


Differential Revision: http://reviews.llvm.org/D6935

llvm-svn: 225810