Commented out export of missing CRML source file to avoid build error.
There are no known side effects of this file being missing, so this seems a reasonable way to avoid the build error.
[D-BUS Service]
Name=org.freedesktop.DBus.TestSuiteShellEchoServiceFail
Exec=@TEST_SHELL_SERVICE_BINARY@ "this should 'fail' because of an unterminated quote