[OpenMP] Build device runtimes for sm_87

Summary:
These were missing from the list of all architectures.

Differential Revision: https://reviews.llvm.org/D155287

Author: Munesanz

openmp/libomptarget/DeviceRTL/CMakeLists.txt

@@ -59,7 +59,7 @@ set(all_amdgpu_architectures "gfx700;gfx701;gfx801;gfx803;gfx900;gfx902;gfx906"
                              "gfx1031;gfx1032;gfx1033;gfx1034;gfx1035;gfx1036"
                              "gfx1100;gfx1101;gfx1102;gfx1103")
 set(all_nvptx_architectures "sm_35;sm_37;sm_50;sm_52;sm_53;sm_60;sm_61;sm_62"
-                            "sm_70;sm_72;sm_75;sm_80;sm_86;sm_89;sm_90")
+                            "sm_70;sm_72;sm_75;sm_80;sm_86;sm_87;sm_89;sm_90")
 set(all_gpu_architectures
     "${all_amdgpu_architectures};${all_nvptx_architectures}")