Convert tests using "| wc -l | grep ..." to use the count script.

llvm-svn: 41097
diff --git a/llvm/test/CodeGen/PowerPC/mulhs.ll b/llvm/test/CodeGen/PowerPC/mulhs.ll
index 967905d..7661e9c 100644
--- a/llvm/test/CodeGen/PowerPC/mulhs.ll
+++ b/llvm/test/CodeGen/PowerPC/mulhs.ll
@@ -3,7 +3,7 @@
 ; RUN: not grep mulhwu %t
 ; RUN: not grep srawi %t 
 ; RUN: not grep add %t 
-; RUN: grep mulhw %t | wc -l | grep 1
+; RUN: grep mulhw %t | count 1
 
 implementation   ; Functions: