Fix typo in ARM macro assembler Pop() method.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/138163002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18583 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/macro-assembler-arm.h

@@ -389,7 +389,7 @@ class MacroAssembler: public Assembler {
       }
     } else {
       Pop(src2, src3, cond);
-      str(src1, MemOperand(sp, 4, PostIndex), cond);
+      ldr(src1, MemOperand(sp, 4, PostIndex), cond);
     }
   }