Rewrite test/ExecutionEngine tests to use FileCheck instead of grep

llvm-svn: 179043
diff --git a/llvm/test/ExecutionEngine/fpbitcast.ll b/llvm/test/ExecutionEngine/fpbitcast.ll
index fa84be4..e6d06f8 100644
--- a/llvm/test/ExecutionEngine/fpbitcast.ll
+++ b/llvm/test/ExecutionEngine/fpbitcast.ll
@@ -1,5 +1,6 @@
-; RUN: %lli -force-interpreter=true %s | grep 40091eb8
-;
+; RUN: %lli -force-interpreter=true %s | FileCheck %s
+; CHECK: 40091eb8
+
 define i32 @test(double %x) {
 entry:
 	%x46.i = bitcast double %x to i64