[CMake][Release] Statically link ZSTD on all OSes

This will make the binaries more portable.

Author: tstellar

clang/cmake/caches/Release.cmake

@@ -128,6 +128,4 @@ set_final_stage_var(LLVM_ENABLE_PROJECTS "${LLVM_RELEASE_ENABLE_PROJECTS}" STRIN
 set_final_stage_var(CPACK_GENERATOR "TXZ" STRING)
 set_final_stage_var(CPACK_ARCHIVE_THREADS "0" STRING)
 
-if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Darwin")
-  set_final_stage_var(LLVM_USE_STATIC_ZSTD "ON" BOOL)
-endif()
+set_final_stage_var(LLVM_USE_STATIC_ZSTD "ON" BOOL)