Fix some escaping and quoting in RUN lines, mainly involving { and <. In two

cases quoting of <{ didn't work out, so I changed the grep to check for }>
instead.

This fixes 7 testcases that were not properly running before.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52182 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/ScalarRepl/2003-10-29-ArrayProblem.ll

@@ -1,5 +1,5 @@
 ; RUN: llvm-as < %s | opt -scalarrepl | llvm-dis | \
-; RUN:   grep alloca | grep \{
+; RUN:   grep alloca | grep {\\{}
 
 declare i32 @.callback_1(i8*)