Fixed 'make clean' for wiki docs

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Merged revisions 398198 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@398205 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Makefile

@@ -416,7 +416,8 @@ _clean:
 	rm -f main/version.c
 	rm -f doc/core-en_US.xml
 	rm -f doc/full-en_US.xml
-	rm -f docs/rest-api/*.wiki
+	rm -f doc/rest-api/*.wiki
+	rm -f rest-api-templates/*.pyc
 	@$(MAKE) -C menuselect clean
 	cp -f .cleancount .lastclean