[MSan] [MIPS] Adding support for MIPS64 (patch by Mohit Bhakkad).

Reviewed at http://reviews.llvm.org/D5906

llvm-svn: 222388
diff --git a/compiler-rt/lib/msan/msan_report.cc b/compiler-rt/lib/msan/msan_report.cc
index 0f30637..f4978c7 100644
--- a/compiler-rt/lib/msan/msan_report.cc
+++ b/compiler-rt/lib/msan/msan_report.cc
@@ -53,7 +53,7 @@
   if (pc) {
     // For some reason function address in LLVM IR is 1 less then the address
     // of the first instruction.
-    pc += 1;
+    pc = StackTrace::GetNextInstructionPc(pc);
     StackTrace(&pc, 1).Print();
   }
 }