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

# This file is part of MXE.
# See index.html for further information.

This patch has been taken from:
https://issues.apache.org/jira/browse/XERCESC-1951

diff -r a3f28cf10046 xerces-c.pc.in
--- a/xerces-c.pc.in	Mon Nov 29 00:46:50 2010 +0100
+++ b/xerces-c.pc.in	Mon Nov 29 00:58:47 2010 +0100
@@ -7,4 +7,5 @@
 Description: Validating XML parser library for C++
 Version: @VERSION@
 Libs: -L${libdir} -lxerces-c
+Libs.private: @CURL_LIBS@
 Cflags: -I${includedir}