Buildsystem: Clean up the revision.h target generation

- rename src/revision.h folder to src/genrev
- ensure BUILDDIR/revision.h file is cleared/removed before generation (deleted/recreated during buildmode-changes)
Note: This needs further testing, so please give feedback.

--HG--
branch : trunk
rename : src/revision.h/CMakeLists.txt => src/genrev/CMakeLists.txt

cmake/genrev.cmake

@@ -67,4 +67,3 @@ configure_file(
   "${BUILDDIR}/revision.h"
   @ONLY
 )
-message(STATUS "Created revision.h")

src/CMakeLists.txt

@@ -8,7 +8,7 @@
 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
-add_subdirectory(revision.h)
+add_subdirectory(genrev)
 add_subdirectory(server)
 
 if(TOOLS)

src/genrev/CMakeLists.txt

@@ -10,6 +10,7 @@
 
 # Need to pass old ${CMAKE_BINARY_DIR} as param because its different at build stage
 add_custom_target(revision.h ALL
+  COMMAND ${CMAKE_COMMAND} -E remove ${CMAKE_BINARY_DIR}/revision.h
   COMMAND ${CMAKE_COMMAND} -DBUILDDIR=${CMAKE_BINARY_DIR} -P ${CMAKE_SOURCE_DIR}/cmake/genrev.cmake
   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
 )