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 pixman-0.30.0-orig/pixman/Makefile.in pixman-0.30.0/pixman/Makefile.in
--- pixman-0.30.0-orig/pixman/Makefile.in	2013-05-08 19:25:31 -0400
+++ pixman-0.30.0/pixman/Makefile.in	2013-07-22 12:07:31 -0400
@@ -475,7 +475,7 @@
 lib_LTLIBRARIES = libpixman-1.la
 libpixman_1_la_LDFLAGS = -version-info $(LT_VERSION_INFO) \
 	-no-undefined @PTHREAD_LDFLAGS@ $(am__append_2) \
-	$(am__append_7) $(am__append_18)
+	$(am__append_7) $(am__append_18) -export-symbols-regex "^pixman_.*"
 libpixman_1_la_LIBADD = @PTHREAD_LIBS@ -lm $(am__append_3) \
 	$(am__append_5) $(am__append_8) $(am__append_10) \
 	$(am__append_12) $(am__append_14) $(am__append_16) \