telepathy-glib: fix build with automake 1.12.x

telepathy-glib: fix build with automake 1.12.x

automake 1.12.x automatically deletes empty directories, so
the additional rmdir from the do_install_append fails.

cleanup the do_install_append for automake 1.12.x

avoid this issue:
| rmdir: failed to remove `/srv/home/nitin/builds/build-gcc47/tmp/work/i586-poky-linux/telepathy-glib-0.18.1-r0/image/usr/bin': No such file or directory
NOTE: package telepathy-glib-0.18.1-r0: task do_install: Failed

no PR bump as no change in the output

(From OE-Core rev: bd8e8550c8d7ab7daea8d63d6850c22639e7fb85)

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>