[wip/pal-statistics] Add patch-aa

to fix configure when GMOCK_FOUND is not set.

pal-statistics/Makefile

@@ -37,6 +37,7 @@ include ../../interfaces/ros-std-msgs/depend.mk
 include ../../lang/ros-message-generation/depend.mk
 include ../../lang/ros-message-runtime/depend.mk
 include ../../middleware/ros-comm/depend.mk
+include ../../mk/sysdep/googletest.mk
 include ../../mk/language/c++.mk
 include ../../mk/language/c.mk
 include ../../mk/robotpkg.mk

pal-statistics/distinfo

 SHA1 (pal-statistics/1.3.1.tar.gz) = ffbf1fec732cb39af874859b9db39e6cbd57aa95
 RMD160 (pal-statistics/1.3.1.tar.gz) = 442798405509c712b3289f5eb2fa5fc500c20046
 Size (pal-statistics/1.3.1.tar.gz) = 329941 bytes
+SHA1 (patch-aa) = 334e32f45341e7b778485ce42e6ebefea8c720fb

pal-statistics/patches/patch-aa

+if GMOCK is not found, pal_statistics-test target doesn't exist:
+https://github.com/pal-robotics-forks/ros_comm/blob/lunar-devel/tools/rostest/cmake/rostest-extras.cmake.em#L78
+
+--- pal_statistics/CMakeLists.txt.orig	2019-08-28 13:19:58.000000000 +0200
++++ pal_statistics/CMakeLists.txt	2020-02-18 18:55:58.287631522 +0100
+@@ -104,10 +104,12 @@
+                                 ${PROJECT_NAME}
+                                 ${catkin_LIBRARIES})
+ 
++    IF(GMOCK_FOUND)
+     add_rostest_gmock(pal_statistics-test test/pal_statistics.test test/gtest_pal_statistics.cpp)
+     target_link_libraries(pal_statistics-test
+                                 ${PROJECT_NAME}
+                                 ${catkin_LIBRARIES})
++    ENDIF(GMOCK_FOUND)
+ 
+     add_rostest(test/pal_statistics_py.test)
+ endif(CATKIN_ENABLE_TESTING)