Convert the uses of '|&' to use '2>&1 |' instead, which works on old
versions of Bash. In addition, I can back out the change to the lit
built-in shell test runner to support this.

This should fix the majority of fallout on Darwin, but I suspect there
will be a few straggling issues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159544 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Assembler/2008-09-02-FunctionNotes2.ll b/test/Assembler/2008-09-02-FunctionNotes2.ll
index 8a49e89..97351e2 100644
--- a/test/Assembler/2008-09-02-FunctionNotes2.ll
+++ b/test/Assembler/2008-09-02-FunctionNotes2.ll
@@ -1,5 +1,5 @@
 ; Test function notes
-; RUN: not llvm-as %s -o /dev/null |& grep "Attributes noinline alwaysinline are incompatible"
+; RUN: not llvm-as %s -o /dev/null 2>&1 | grep "Attributes noinline alwaysinline are incompatible"
 define void @fn1() alwaysinline  noinline {
   ret void
 }