Fix a grep error that caused CodeGenObjC/encode-test.m to fail.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@61455 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenObjC/encode-test.m

@@ -3,7 +3,7 @@
 // RUN: grep -e "{Derived=#ib32b8b3b8sb16b8b8b2b8ccb6}" %t | count 1 &&
 // RUN: grep -e "{B1=#@c}" %t | count 1 &&
 // RUN: grep -e "v12@0:4\[3\[4{Test=i}]]8" %t | count 1 &&
-// RUN: grep -e "r^{S=i}" %t | count 1 &&
+// RUN: grep -e "r\^{S=i}" %t | count 1 &&
 // RUN: grep -e "\^{Object=#}" %t | count 1
 
 @class Int1;