Fix testcase, the 'shift out all bits' doesn't apply to signed types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2482 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/shift.ll

@@ -28,8 +28,8 @@ int "test4"(ubyte %A) {
 	ret int %B
 }
 
-int "test5"(int %A) {
-	%B = shr int %A, ubyte 32  ;; shift all bits out
-	ret int %B
+uint "test5"(uint %A) {
+	%B = shr uint %A, ubyte 32  ;; shift all bits out
+	ret uint %B
 }