Fix the TCL-style quoting in one random test that somehow slipped

through my perl nets.

With this, the test suite passes even if I force it to run with the
built-in shell test logic, except for a test which REQUIREs shell.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159529 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/Thumb2/thumb2-ldr_post.ll

@@ -1,5 +1,5 @@
 ; RUN: llc < %s -march=thumb -mattr=+thumb2 | \
-; RUN:   grep {ldr.*\\\[.*\],} | count 1
+; RUN:   grep "ldr.*\[.*\]," | count 1
 
 define i32 @test(i32 %a, i32 %b, i32 %c) {
         %tmp1 = mul i32 %a, %b          ; <i32> [#uses=2]