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 strings-1.2.0.orig/src/Makefile strings-1.2.0/src/Makefile
--- strings-1.2.0.orig/src/Makefile	2015-06-08 13:43:45.551556353 -0400
+++ strings-1.2.0/src/Makefile	2015-06-08 13:45:22.693478306 -0400
@@ -1,11 +1,7 @@
 OCTAVE ?= octave
 MKOCTFILE ?= mkoctfile -Wall
 
-PCRE_SWITCHES := $(shell $(OCTAVE) \
-	--no-gui --no-init-file --no-site-file --silent --no-history \
-	--eval 'disp (octave_config_info ("PCRE_LIBS"));' \
-	--eval 'disp (octave_config_info ("PCRE_CPPFLAGS"));' \
-	)
+PCRE_SWITCHES := $(shell pcre-config --libs)
 
 pcregexp.oct: %.oct: %.cc
 	$(MKOCTFILE) $(PCRE_SWITCHES) -o $@ $<