[A-902] New on SlackBot

------------------------
** Updated buildtools **
------------------------
l1 (Miscellaneous libraries)
-liblensfun upgraded to 0.2.3-1
Added 01-lensfun-db-cameras-generic.dpatch to the package.
Added 02-lensfun-db-cameras-canon.dpatch to the package.
Added 03-lensfun-db-cameras-nikon.dpatch to the package.
Added 04-lensfun-db-cameras-pentax.dpatch to the package.
Added 05-lensfun-db-cameras-samsung.dpatch to the package.
Added 10-makedep-fix-ftbfs.dpatch to the package.
Added 20-enum-sentinel.dpatch to the package.
Downgraded to 0.2.3 since 0.2.5 seem to be unstable.
Applied patches to 0.2.3 taken from the buntu team.
+--------------------+