PPC: Fix 'Remove materialized objects on stack unwind.'

R=mstarzinger@chromium.org, jarin@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1123793002

Cr-Commit-Position: refs/heads/master@{#28209}

src/ppc/code-stubs-ppc.cc

@@ -1131,7 +1131,7 @@ void CEntryStub::Generate(MacroAssembler* masm) {
 
   // Ask the runtime for help to determine the handler. This will set r3 to
   // contain the current pending exception, don't clobber it.
-  ExternalReference find_handler(Runtime::kUnwindFindExceptionHandler,
+  ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler,
                                  isolate());
   {
     FrameScope scope(masm, StackFrame::MANUAL);