[Tests] NFC: Vectors are not always 128 bits

Author: davezarzycki

test/IRGen/vector_reduction.swift

@@ -7,7 +7,7 @@
 
 // We were missing target transform info and not vectorizing the loop below.
 
-// CHECK: xor <2 x i64>
+// CHECK: xor <{{[2,4,8]}} x i64>
 
 public func f(a: UnsafePointer<Int>, b: UnsafePointer<Int>, count: Int) -> Int {
   var c = 0