[LV] Modify test case for commit 4f9a544

Was observing test failure. Relanding the test

(cherry picked from commit 0ec4cae)

Author: sushgokh

llvm/test/Transforms/LoopVectorize/AArch64/reg-usage.ll

@@ -14,11 +14,11 @@
 define void @get_invariant_reg_usage(ptr %z) {
 ; CHECK: LV: Checking a loop in 'get_invariant_reg_usage'
 ; CHECK: LV(REG): VF = vscale x 16
-; CHECK: LV(REG): Found max usage: 1 item
-; CHECK: LV(REG): RegisterClass: Generic::ScalarRC, 3 registers
-; CHECK: LV(REG): Found invariant usage: 2 item
-; CHECK: LV(REG): RegisterClass: Generic::VectorRC, 8 registers
-; CHECK: LV(REG): RegisterClass: Generic::ScalarRC, 2 registers
+; CHECK-NEXT: LV(REG): Found max usage: 1 item
+; CHECK-NEXT: LV(REG): RegisterClass: Generic::ScalarRC, 3 registers
+; CHECK-NEXT: LV(REG): Found invariant usage: 2 item
+; CHECK-NEXT: RegisterClass: Generic::ScalarRC, 2 registers
+; CHECK-NEXT: RegisterClass: Generic::VectorRC, 8 registers 
 
 L.entry:
   %0 = load i128, ptr %z, align 16