build: set the CMAKE_RUNTIME_OUTPUT_DIRECTORY

Add a `CMAKE_RUNTIME_OUTPUT_DIRECTORY` to co-locate the runtime
components which is important for resolving the interdependencies.
Without this the libraries are not really usable.

Author: compnerd

CMakeLists.txt

@@ -20,6 +20,7 @@ set(SWIFT_HOST_LIBRARIES_SUBDIRECTORY "swift/host")
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib/${SWIFT_HOST_LIBRARIES_SUBDIRECTORY}")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib/${SWIFT_HOST_LIBRARIES_SUBDIRECTORY}")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 
 set(CMAKE_MACOSX_RPATH YES)