Add gfx908 target (#106)

[ROCm/rccl commit: 1969e89003]

projects/rccl/CMakeLists.txt

@@ -135,13 +135,15 @@ endif()
 target_link_libraries(rccl
   PRIVATE --amdgpu-target=gfx803
   PRIVATE --amdgpu-target=gfx900
-  PRIVATE --amdgpu-target=gfx906)
+  PRIVATE --amdgpu-target=gfx906
+  PRIVATE --amdgpu-target=gfx908)
 
 if("${HIP_COMPILER}" MATCHES "clang")
   target_compile_options(rccl
     PRIVATE --amdgpu-target=gfx803
     PRIVATE --amdgpu-target=gfx900
     PRIVATE --amdgpu-target=gfx906
+    PRIVATE --amdgpu-target=gfx908
     PRIVATE -fgpu-rdc)
   target_link_libraries(rccl PRIVATE -fgpu-rdc)
 endif()