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/Other/optimize-options.ll b/test/Other/optimize-options.ll
index 5b1fe52..888a78f 100644
--- a/test/Other/optimize-options.ll
+++ b/test/Other/optimize-options.ll
@@ -1,8 +1,8 @@
-;RUN: opt -S -O1 -debug-pass=Arguments |& FileCheck %s
-;RUN: opt -S -O2 -debug-pass=Arguments |& FileCheck %s
-;RUN: opt -S -Os -debug-pass=Arguments |& FileCheck %s
-;RUN: opt -S -Oz -debug-pass=Arguments |& FileCheck %s
-;RUN: opt -S -O3 -debug-pass=Arguments |& FileCheck %s
+;RUN: opt -S -O1 -debug-pass=Arguments 2>&1 | FileCheck %s
+;RUN: opt -S -O2 -debug-pass=Arguments 2>&1 | FileCheck %s
+;RUN: opt -S -Os -debug-pass=Arguments 2>&1 | FileCheck %s
+;RUN: opt -S -Oz -debug-pass=Arguments 2>&1 | FileCheck %s
+;RUN: opt -S -O3 -debug-pass=Arguments 2>&1 | FileCheck %s
 
 ; Just check that we get a non-empty set of passes for each -O opton.
 ;CHECK: Pass Arguments: {{.*}} -print-module