Fix distribution in share/

EXTRA_DATA doesn't seem to be a "primary" even if DATA is and EXTRA is a valid prefix.
Also i don't think .vlt are often rebuilt so it should be in clean rather than mostly clean
(cherry picked from commit 4fdaf53d)

share/Makefile.am

-MOSTLYCLEANFILES = $(nodist_EXTRA_DATA)
+CLEANFILES = skins2/default.vlt
 
 nobase_dist_data_DATA = applications/vlc.desktop
 
@@ -15,10 +15,7 @@ nobase_dist_vlcdata_SCRIPTS = \
 	$(NULL)
 
 EXTRA_DIST = \
-	$(skins2_default_vlt_FILES)
-
-nobase_vlcdata_DATA =
-dist_EXTRA_DATA = \
+	$(skins2_default_vlt_FILES) \
 	$(DIST_rsrc) \
 	$(DIST_pda) \
 	$(DIST_skins2) \
@@ -28,9 +25,8 @@ dist_EXTRA_DATA = \
 	$(DIST_osdmenu_default) \
 	$(DIST_mozilla) \
 	$(DIST_maemo)
-nodist_EXTRA_DATA = \
-	 skins2/default.vlt
 
+nobase_vlcdata_DATA =
 if BUILD_SKINS
 nobase_vlcdata_DATA += skins2/default.vlt
 nobase_vlcdata_DATA += $(DIST_skins2)