Eliminate questionable syntax for stdin redirection. This probably also speeds things up a bit.

llvm-svn: 51357
diff --git a/llvm/test/ExecutionEngine/test-loop.ll b/llvm/test/ExecutionEngine/test-loop.ll
index d428adc..78fc314 100644
--- a/llvm/test/ExecutionEngine/test-loop.ll
+++ b/llvm/test/ExecutionEngine/test-loop.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s -f -o %t.bc
+; RUN: llvm-as %s -f -o %t.bc
 ; RUN: lli %t.bc > /dev/null
 
 define i32 @main() {