Merge commit 'f960fd2f'

* commit 'f960fd2f':
  build: Skip generating .version files when reconfiguring
Merged-by: James Almer <jamrial@gmail.com>

ffbuild/library.mak

 include $(SRC_PATH)/ffbuild/common.mak
 
-ifeq (,$(filter %clean,$(MAKECMDGOALS)))
+ifeq (,$(filter %clean config,$(MAKECMDGOALS)))
 -include $(SUBDIR)lib$(NAME).version
 endif