[cpack_installer] bootstrap installer is copied to root of build directory. uploads directory is cleaned before copied to.

cmake/Platform/Windows/PackagingPostBuild.cmake

@@ -54,7 +54,7 @@ set(_light_command
     -o "${_bootstrap_output_file}"
 )
 
-message(STATUS "Creating Installer Bootstrapper...")
+message(STATUS "Creating Bootstrap Installer...")
 execute_process(
     COMMAND ${_candle_command}
     COMMAND_ERROR_IS_FATAL ANY
@@ -64,6 +64,12 @@ execute_process(
     COMMAND_ERROR_IS_FATAL ANY
 )
 
+file(COPY ${_bootstrap_output_file}
+    DESTINATION ${CPACK_PACKAGE_DIRECTORY}
+)
+
+message(STATUS "Bootstrap installer generated to ${CPACK_PACKAGE_DIRECTORY}/${_bootstrap_filename}")
+
 # use the internal default path if somehow not specified from cpack_configure_downloads
 if(NOT CPACK_UPLOAD_DIRECTORY)
     set(CPACK_UPLOAD_DIRECTORY ${CPACK_PACKAGE_DIRECTORY}/CPackUploads)
@@ -73,6 +79,7 @@ endif()
 # through cpack_configure_downloads.  this mimics the same process cpack does natively for
 # some other frameworks that have built-in online installer support.
 message(STATUS "Copying installer artifacts to upload directory...")
+file(REMOVE_RECURSE ${CPACK_UPLOAD_DIRECTORY})
 file(GLOB _artifacts "${_cpack_wix_out_dir}/*.msi" "${_cpack_wix_out_dir}/*.cab")
 file(COPY ${_artifacts}
     DESTINATION ${CPACK_UPLOAD_DIRECTORY}