Fix distcheck

We need to distribute the GtkDoc header generation script.

We need not to distribute the generated header, otherwise the VPATH
lookup would find the distributed one in $(srcdir) and try to update
it; but touching $(srcdir) is a bad thing.

Makefile.am

@@ -15,6 +15,7 @@ WIN32_BUILD_FILES = \
 
 EXTRA_DIST = \
 	autogen.sh \
+	scripts/gen-api-gtkdoc.py \
 	wscript \
 	waf \
 	geany.desktop.in \

doc/Makefile.am

@@ -128,7 +128,7 @@ geany-gtkdoc.h: Doxyfile.stamp $(top_srcdir)/scripts/gen-api-gtkdoc.py
 ALL_TARGETS += geany-gtkdoc.h
 
 geany_gtkdocincludedir = $(includedir)/geany/gtkdoc
-geany_gtkdocinclude_HEADERS = geany-gtkdoc.h
+nodist_geany_gtkdocinclude_HEADERS = geany-gtkdoc.h
 
 endif
 
@@ -136,7 +136,7 @@ all-local: $(ALL_TARGETS)
 
 clean-local: clean-api-docs-local
 clean-api-docs-local:
-	-rm -rf reference/ xml/ doxygen_* $(ALL_TARGETS)
+	-rm -rf reference/ xml/ doxygen_* Doxyfile-gi $(ALL_TARGETS)
 
 endif