[NFC][llvm-spirv] Use CHECK-DAG for constants in keep-tracked-const.ll

Author: jsji

llvm-spirv/test/SpecConstants/keep-tracked-const.ll

@@ -17,8 +17,8 @@ target triple = "spir64-unknown-unknown"
 ; CHECK: Constant [[#Int8]] [[#]] 1
 ; CHECK: Constant [[#Int8]] [[#]] 0
 
-; CHECK: Constant [[#Int32]] [[#]] 0
-; CHECK: Constant [[#Int32]] [[#]] 1
+; CHECK-DAG: Constant [[#Int32]] [[#]] 0
+; CHECK-DAG: Constant [[#Int32]] [[#]] 1
 
 ; CHECK-LLVM: %conv17.i = sext i8 1 to i64