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

llvm-svn: 41097
diff --git a/llvm/test/CodeGen/ARM/uxtb.ll b/llvm/test/CodeGen/ARM/uxtb.ll
index 86c99da..1787d6f 100644
--- a/llvm/test/CodeGen/ARM/uxtb.ll
+++ b/llvm/test/CodeGen/ARM/uxtb.ll
@@ -1,5 +1,5 @@
 ; RUN: llvm-upgrade < %s | llvm-as | llc -march=arm -mattr=+v6 | \
-; RUN:   grep uxt | wc -l | grep 10
+; RUN:   grep uxt | count 10
 ; END.
 
 uint %test1(uint %x) {