make EXTRA_CLEAN a command that can be run

Signed-off-by: mateoconlechuga <matthewwaltzis@gmail.com>

Author: mateoconlechuga

docs/static/makefile-options.rst

@@ -194,6 +194,12 @@ Extra libload (``.lib``) libraries to be added at link time.
 
     EXTRA_LIBLOAD_LIBS = <space separated list of libraries>
 
+Extra command(s) to run when :code:`make clean` is executed.
+
+.. code-block:: makefile
+
+    EXTRA_CLEAN =
+
 .. rubric:: MAKE_GFX
 
 This is the command that is run when :code:`make gfx` is executed.

src/makefile.mk

@@ -290,7 +290,7 @@ $(ICONSRC): $(ICONIMG) $(MAKEFILE_LIST) $(DEPS)
 endif
 
 clean:
-	$(Q)$(call RM,$(EXTRA_CLEAN))
+	$(Q)$(EXTRA_CLEAN)
 	$(Q)$(call RMDIR,$(OBJDIR) $(BINDIR))
 	$(Q)echo Removed built binaries and objects.