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 libmng-2.0.2-orig/Makefile.am libmng-2.0.2/Makefile.am
--- libmng-2.0.2-orig/Makefile.am	2013-03-05 06:59:27 -0500
+++ libmng-2.0.2/Makefile.am	2013-11-09 12:13:37 -0500
@@ -9,6 +9,7 @@
 
 # libmng release @VERSION@
 libmng_la_LDFLAGS = \
+	-no-undefined \
 	-version-number @MNG_MAJOR_NR@:@MNG_MINOR_NR@:@MNG_RELEASE_NR@
 
 lib_LTLIBRARIES = libmng.la