wrapper: bring valac and vapigen to current version

Current wrappers hard-coded them at 0.42 which is very long ago.
Hence, those wrappers insert a versioned vapidir that no longer exists.
The build still work because valac will look into host's versioned vapidir
instead.

Let's check the version we're having and wrap that instead of changing
the hard-coded number from time to time.

common/hooks/pre-configure/02-script-wrapper.sh

@@ -99,35 +99,47 @@ _EOF
 }
 
 vapigen_wrapper() {
+	local _vala_version _file
 	if [ ! -x /usr/bin/vapigen ]; then
 		return 0
 	fi
 	[ -x ${XBPS_WRAPPERDIR}/vapigen ] && return 0
+	for _file in /usr/bin/vapigen-*; do
+		if [ -x "${_file}" ]; then
+			_vala_version=${_file#*-}
+		fi
+	done
 	cat >>${XBPS_WRAPPERDIR}/vapigen<<_EOF
 #!/bin/sh
 exec /usr/bin/vapigen \\
 	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala/vapi \\
-	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala-0.42/vapi \\
+	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala-${_vala_version}/vapi \\
 	 --girdir=${XBPS_CROSS_BASE}/usr/share/gir-1.0 "\$@"
 _EOF
 	chmod 755 ${XBPS_WRAPPERDIR}/vapigen
-	ln -sf vapigen ${XBPS_WRAPPERDIR}/vapigen-0.42
+	ln -sf vapigen ${XBPS_WRAPPERDIR}/vapigen-${_vala_version}
 }
 
 valac_wrapper() {
+	local _vala_version _file
 	if [ ! -x /usr/bin/valac ]; then
 		return 0
 	fi
 	[ -x ${XBPS_WRAPPERDIR}/valac ] && return 0
+	for _file in /usr/bin/valac-*; do
+		if [ -x "${_file}" ]; then
+			_vala_version=${_file#*-}
+		fi
+	done
 	cat >>${XBPS_WRAPPERDIR}/valac<<_EOF
 #!/bin/sh
 exec /usr/bin/valac \\
 	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala/vapi \\
-	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala-0.42/vapi \\
+	 --vapidir=${XBPS_CROSS_BASE}/usr/share/vala-${_vala_version}/vapi \\
 	 --girdir=${XBPS_CROSS_BASE}/usr/share/gir-1.0 "\$@"
 _EOF
 	chmod 755 ${XBPS_WRAPPERDIR}/valac
-	ln -sf valac ${XBPS_WRAPPERDIR}/valac-0.42
+	ln -sf valac ${XBPS_WRAPPERDIR}/valac-${_vala_version}
 }
 
 install_wrappers() {