Correct an error in naming in a lit-test

Author: yoonseoch

llvm/test/CodeGen/AMDGPU/postra-bundle-memops.mir

@@ -358,7 +358,7 @@ name: no_sched_barrier_within_bundle
 tracksRegLiveness: true
 body: |
   bb.0:
-    ; GCN-LABEL: name: no_bundle_with_sched_barrier
+    ; GCN-LABLE: name: no_sched_barrier_within_bundle
     ; GCN: renamable $sgpr0_sgpr1 = IMPLICIT_DEF
     ; GCN-NEXT: renamable $vgpr0 = IMPLICIT_DEF
     ; GCN-NEXT: BUNDLE implicit-def $vgpr1, implicit-def $vgpr1_lo16, implicit-def $vgpr1_hi16, implicit-def $vgpr2, implicit-def $vgpr2_lo16, implicit-def $vgpr2_hi16, implicit $sgpr0_sgpr1, implicit $vgpr0, implicit $exec {