Try to escape the '$'s in these so they reach the underlying 'sh' invocation.

I have no idea how lit did the right thing here, but other test runners don't.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111805 91177308-0d34-0410-b5e6-96231b3b80d8

test/Other/close-stderr.ll

@@ -1,6 +1,6 @@
 ; RUN: sh -c "\
-; RUN:        opt --reject-this-option 2>&-; echo $?; \
-; RUN:        opt -o /dev/null /dev/null 2>&-; echo $?; \
+; RUN:        opt --reject-this-option 2>&-; echo \$?; \
+; RUN:        opt -o /dev/null /dev/null 2>&-; echo \$?; \
 ; RUN:       " | FileCheck %s
 ; CHECK: {{^1$}}
 ; CHECK: {{^0$}}