[Gardening] Test: Improved match name.

Author: nate-chandler

test/SILOptimizer/ossa_lifetime_completion.sil

@@ -442,8 +442,8 @@ indirect enum IndirectEnumNontrivialPayload {
 // CHECK:       [[ONE_CASE]]([[BOX:%[^,]+]] :
 // CHECK:         [[C_ADDR:%[^,]+]] = project_box [[BOX]]
 // CHECK:         [[C:%[^,]+]] = load_borrow [[C_ADDR]]
-// CHECK:         cond_br undef, {{bb[0-9]+}}, [[BASIC_BLOCK4:bb[0-9]+]]
-// CHECK:       [[BASIC_BLOCK4]]:
+// CHECK:         cond_br undef, {{bb[0-9]+}}, [[RIGHT:bb[0-9]+]]
+// CHECK:       [[RIGHT]]:
 // CHECK:         end_borrow [[C]]
 // CHECK:         dealloc_box [[BOX]]
 // CHECK:         unreachable