gnu: Add biboumi.

* gnu/packages/messaging.scm (biboumi): New variable.
* gnu/packages/patches/biboumi-cmake-ignore-git.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Add it.

Change-Id: Ibb2bcadc8f64cbda3a0dbfe8ef5a931c52052658
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/patches/biboumi-cmake-ignore-git.patch

@@ -0,0 +1,45 @@
+Description: Avoid cmake messing with git
+Author: Jonas Smedegaard <dr@jones.dk>
+Last-Update: 2016-12-21
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -288,27 +288,6 @@
+ endforeach()
+ 
+ #
+-## Add a rule to download the catch unit test framework
+-#
+-include(ExternalProject)
+-ExternalProject_Add(catch
+-  GIT_REPOSITORY "https://lab.louiz.org/louiz/Catch.git"
+-  PREFIX "external"
+-  UPDATE_COMMAND ""
+-  CONFIGURE_COMMAND ""
+-  BUILD_COMMAND ""
+-  INSTALL_COMMAND ""
+-  )
+-set_target_properties(catch PROPERTIES EXCLUDE_FROM_ALL TRUE)
+-ExternalProject_Get_Property(catch SOURCE_DIR)
+-if(NOT EXISTS ${CMAKE_SOURCE_DIR}/tests/catch.hpp)
+-  target_include_directories(test_suite
+-    PUBLIC "${SOURCE_DIR}/single_include/"
+-    )
+-  add_dependencies(test_suite catch)
+-endif()
+-
+-#
+ ## Add some custom rules to launch the tests
+ #
+ add_custom_target(check COMMAND "test_suite"
+@@ -371,8 +350,7 @@
+   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+   )
+ add_custom_target(dist
+-  DEPENDS ${ARCHIVE_NAME}.tar.xz
+-  DEPENDS catch)
++  DEPENDS ${ARCHIVE_NAME}.tar.xz)
+ 
+ add_custom_target(rpm
+   DEPENDS dist