Add more CMake variables to pass to vendor projects (#519)

* CMAKE_FIND_DEBUG_MODE: Similar to CMAKE_VERBOSE_MAKEFILE, this flag
  causes CMake to generate additional console output.
* CMAKE_MODULE_PATH: Similar to CMAKE_PREFIX_PATH, this list of
  directories can be used to help CMake search additional locations for
  package finding modules.

Signed-off-by: Scott K Logan <[email protected]>

Author: cottsay

ament_cmake_vendor_package/cmake/ament_vendor.cmake

@@ -233,10 +233,18 @@ function(_ament_vendor TARGET_NAME VCS_TYPE VCS_URL VCS_VERSION PATCHES CMAKE_AR
     set(CMAKE_ARGS_CONTENT "${CMAKE_ARGS_CONTENT}\nset(CMAKE_VERBOSE_MAKEFILE [=[${CMAKE_VERBOSE_MAKEFILE}]=] CACHE INTERNAL \"\")")
   endif()
 
+  if(DEFINED CMAKE_FIND_DEBUG_MODE)
+    set(CMAKE_ARGS_CONTENT "${CMAKE_ARGS_CONTENT}\nset(CMAKE_FIND_DEBUG_MODE [=[${CMAKE_FIND_DEBUG_MODE}]=] CACHE INTERNAL \"\")")
+  endif()
+
   if(DEFINED CMAKE_BUILD_TYPE)
     set(CMAKE_ARGS_CONTENT "${CMAKE_ARGS_CONTENT}\nset(CMAKE_BUILD_TYPE [=[${CMAKE_BUILD_TYPE}]=] CACHE INTERNAL \"\")")
   endif()
 
+  if(DEFINED CMAKE_MODULE_PATH)
+    set(CMAKE_ARGS_CONTENT "${CMAKE_ARGS_CONTENT}\nset(CMAKE_MODULE_PATH [=[${CMAKE_MODULE_PATH}]=] CACHE INTERNAL \"\")")
+  endif()
+
   list(PREPEND CMAKE_PREFIX_PATH ${_AMENT_CMAKE_VENDOR_PACKAGE_PREFIX_PATH})
   set(CMAKE_ARGS_CONTENT "${CMAKE_ARGS_CONTENT}\nset(CMAKE_PREFIX_PATH [=[${CMAKE_PREFIX_PATH}]=] CACHE INTERNAL \"\")")