[CMake] Add top-level install-compiler-rt target

This is a wrapper target of all the component install targets. This wrapper target will be used by the new LLVM runtimes directory to connect top-level targets to the runtime project target.

llvm-svn: 279333
diff --git a/compiler-rt/cmake/Modules/AddCompilerRT.cmake b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
index 3342248..022c1b7 100644
--- a/compiler-rt/cmake/Modules/AddCompilerRT.cmake
+++ b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
@@ -164,6 +164,7 @@
                                 -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
       set_target_properties(install-${LIB_PARENT_TARGET} PROPERTIES
                             FOLDER "Compiler-RT Misc")
+      add_dependencies(install-compiler-rt install-${LIB_PARENT_TARGET})
     endif()
   endif()