[wip/ros-genmsg] Add a small patch needed for actionlib generated .msg

actionlib generated messages are in "build" directory. Without the patch, the
cmake rules for message generation would install those generated .msg under a
wrong path.

Simply add an optional parameter to add_message_file() and add_service_file()
that allows to specify both the source and destination dir of input files,
instead of considering they are the same. This is only used by actionlib and
has no side effect on other packages.

ros-genmsg/distinfo

 SHA1 (ros-fuerte-genmsg_0.3.10.orig.tar.gz) = 5a94a60e2aebc16bc938d0ec7792fb25e0ce2568
 RMD160 (ros-fuerte-genmsg_0.3.10.orig.tar.gz) = 63d7f7eebfb92498dc1ee84f1acca0d610ae2f17
 Size (ros-fuerte-genmsg_0.3.10.orig.tar.gz) = 55400 bytes
+SHA1 (patch-aa) = dd193db60273203221cec84a8d87b14126e39d59

ros-genmsg/patches/patch-aa

+Add an extrac DST argument to add_{message,service}_files, for actionlib
+generated messages, otherwise actionlib message are installed with the full
+source path of the build directory under CMAKE_INSTALL_PREFIX.
+
+--- cmake/genmsg-extras.cmake.in~	2012-06-04 23:47:14.000000000 +0200
++++ cmake/genmsg-extras.cmake.in	2012-10-09 18:17:22.081648856 +0200
+@@ -26,13 +26,17 @@
+ endmacro()
+ 
+ macro(add_message_files)
+-  parse_arguments(ARG "PACKAGE;FILES;DIRECTORY" "NOINSTALL;PRIVATE" ${ARGN})
++  parse_arguments(ARG "PACKAGE;FILES;DIRECTORY;DST" "NOINSTALL;PRIVATE" ${ARGN})
+   check_unused_arguments("add_message_files" "${ARG_DEFAULT_ARGS}")
+ 
+   if(NOT ARG_PACKAGE)
+     set(ARG_PACKAGE ${PROJECT_NAME})
+   endif()
+ 
++  if(NOT ARG_DST)
++    set(ARG_DST ${ARG_DIRECTORY})
++  endif()
++
+   string(REGEX MATCH "^/.*" IS_FULL_PATH ${ARG_DIRECTORY})
+ 
+   if(IS_FULL_PATH)
+@@ -52,18 +56,21 @@
+   list(APPEND ${PROJECT_NAME}_MESSAGE_FILES_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_DIRECTORY})
+ 
+   if(NOT ARG_NOINSTALL)
+-    install(FILES ${FILES_W_PATH} DESTINATION share/${PROJECT_NAME}/${ARG_DIRECTORY})
++    install(FILES ${FILES_W_PATH} DESTINATION share/${PROJECT_NAME}/${ARG_DST})
+   endif()
+ endmacro()
+ 
+ macro(add_service_files)
+-  parse_arguments(ARG "PACKAGE;FILES;DIRECTORY" "NOINSTALL" ${ARGN})
++  parse_arguments(ARG "PACKAGE;FILES;DIRECTORY;DST" "NOINSTALL" ${ARGN})
+   check_unused_arguments("add_service_files" "${ARG_DEFAULT_ARGS}")
+ 
+   if(NOT ARG_PACKAGE)
+     set(ARG_PACKAGE ${PROJECT_NAME})
+   endif()
+ 
++  if(NOT ARG_DST)
++    set(ARG_DST ${ARG_DIRECTORY})
++  endif()
+ 
+   string(REGEX MATCH "^/.*" IS_FULL_PATH ${ARG_DIRECTORY})
+ 
+@@ -78,7 +85,7 @@
+   list(APPEND ${PROJECT_NAME}_SERVICE_FILES ${FILES_W_PATH})
+ 
+   if(NOT ARG_NOINSTALL)
+-    install(FILES ${FILES_W_PATH} DESTINATION share/${PROJECT_NAME}/${ARG_DIRECTORY})
++    install(FILES ${FILES_W_PATH} DESTINATION share/${PROJECT_NAME}/${ARG_DST})
+   endif()
+ endmacro()
+