[OpenMP] Fix MLIR test after updating visibility

Summray:
I didn't catch this test because I don't build with MLIR.

Author: jhuber6

mlir/test/Target/LLVMIR/omptarget-region-device-llvm.mlir

@@ -25,8 +25,8 @@ module attributes {omp.is_target_device = true} {
 
 // CHECK:      @[[SRC_LOC:.*]] = private unnamed_addr constant [23 x i8] c"{{[^"]*}}", align 1
 // CHECK:      @[[IDENT:.*]] = private unnamed_addr constant %struct.ident_t { i32 0, i32 2, i32 0, i32 22, ptr @[[SRC_LOC]] }, align 8
-// CHECK:      @[[DYNA_ENV:.*]] = weak_odr global %struct.DynamicEnvironmentTy zeroinitializer
-// CHECK:      @[[KERNEL_ENV:.*]] = weak_odr constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 1, i8 1 }, ptr @[[IDENT]], ptr @[[DYNA_ENV]] }
+// CHECK:      @[[DYNA_ENV:.*]] = weak_odr protected global %struct.DynamicEnvironmentTy zeroinitializer
+// CHECK:      @[[KERNEL_ENV:.*]] = weak_odr protected constant %struct.KernelEnvironmentTy { %struct.ConfigurationEnvironmentTy { i8 1, i8 1, i8 1 }, ptr @[[IDENT]], ptr @[[DYNA_ENV]] }
 // CHECK:      define weak_odr protected void @__omp_offloading_{{[^_]+}}_{{[^_]+}}_omp_target_region__l{{[0-9]+}}(ptr %[[ADDR_A:.*]], ptr %[[ADDR_B:.*]], ptr %[[ADDR_C:.*]])
 // CHECK:        %[[INIT:.*]] = call i32 @__kmpc_target_init(ptr @[[KERNEL_ENV]])
 // CHECK-NEXT:   %[[CMP:.*]] = icmp eq i32 %3, -1