[OpenMP] Modifies test to check save-temps on multi-arch compilation with opaque-offload-linker

Tests multi-arch compilation correct file generation with opaque-offload-linker.
Files were previously overwritten when using save-temps due to missing TargetID during unpacking.

Change-Id: Ia909c4d256e69fcfc7112a51f2c10db6eb4d5a77

Author: nicebert

clang/test/Driver/amdgpu-openmp-toolchain.c

@@ -98,6 +98,14 @@
 
 // CHECK-TARGET-ID: clang-offload-packager{{.*}}arch=gfx90a:sramecc-:xnack+,kind=openmp,feature=-sramecc,feature=+xnack
 
+// RUN: %clang -### --save-temps -target x86_64-pc-linux-gnu -fopenmp --offload-arch=gfx90a:xnack+,gfx90a:xnack- \
+// RUN:   -nogpulib %s 2>&1 | FileCheck %s --check-prefix=CHECK-TARGET-ID-MULTI
+// CHECK-TARGET-ID-MULTI: "-cc1" "-triple" "amdgcn-amd-amdhsa" {{.*}} "-target-cpu" "gfx90a" "-target-feature" "+xnack"
+// CHECK-TARGET-ID-MULTI: "-cc1" "-triple" "amdgcn-amd-amdhsa" {{.*}} "-target-cpu" "gfx90a" "-target-feature" "-xnack"
+
+// CHECK-TARGET-ID-MULTI: clang-offload-packager{{.*}}gfx90a:xnack+{{.*}}.bc,triple=amdgcn-amd-amdhsa,arch=gfx90a:xnack+,kind=openmp,feature=+xnack
+// CHECK-TARGET-ID-MULTI: clang-offload-packager{{.*}}gfx90a:xnack-{{.*}}.bc,triple=amdgcn-amd-amdhsa,arch=gfx90a:xnack-,kind=openmp,feature=-xnack
+
 // RUN: not %clang -### -target x86_64-pc-linux-gnu -fopenmp --offload-arch=gfx90a,gfx90a:xnack+ \
 // RUN:   -nogpulib %s 2>&1 | FileCheck %s --check-prefix=CHECK-TARGET-ID-ERROR
 // CHECK-TARGET-ID-ERROR: error: invalid offload arch combinations: 'gfx90a' and 'gfx90a:xnack+'