update broken PKG_UPDATE rules, handle missing update rules * Makefile.in: add handling for packages with no update rule * src/gtk2.mk, src/gtk3.mk, src/libvpx.mk, src/taglib.mk, src/hunspell.mk, src/vala.mk : use github tags for version info * src/llvm.mk: add '?' to update url * src/openscenegraph.mk: update SED rule for version extraction * src/pthread-stubs.mk, src/qt5.mk, src/renderproto.mk, src/sm.mk, src/s2tc.mk, src/util-macros.mk: added dummy PKG_UPDATE rule * src/qscintilla.mk: change search name for version extraction * src/qtbase.mk: use short pkg version in update path * src/suitesparse.mk: update change in main url/version url * src/tre.mk: update download page link * src/vmime.mk: update download and update url * src/wget.mk, src/xapian-core.mk: update url, sed rule * src/wt.mk: update to use github download/update * src/src-msys-libcrypt.mk: update sed rule

diff -ur ocs.old/src/Makefile ocs/src/Makefile
--- ocs.old/src/Makefile	2015-07-07 20:23:51.000000000 -0400
+++ ocs/src/Makefile	2015-07-07 20:24:25.000000000 -0400
@@ -1,9 +1,10 @@
 OCTFILES:=Mshichmanhodgesmosfet.oct
+MKOCTFILE ?= mkoctfile
 
 all: $(OCTFILES)
 
 %.oct:  %.cc
-	mkoctfile $<
+	$(MKOCTFILE) $<
 
 clean:
 	-rm -f *.o core octave-core *.oct *~