liberation-fonts-ttf: update to 2.1.5.

Also:
- update font metadata in pre_build().

srcpkgs/liberation-fonts-ttf/template

@@ -1,6 +1,6 @@
 # Template file for 'liberation-fonts-ttf'
 pkgname=liberation-fonts-ttf
-version=2.1.4
+version=2.1.5
 revision=1
 wrksrc=${pkgname%-*}-${version}
 build_style=gnu-makefile
@@ -12,9 +12,13 @@ license="OFL-1.1"
 homepage="https://github.com/liberationfonts/liberation-fonts"
 changelog="https://raw.githubusercontent.com/liberationfonts/liberation-fonts/devel/ChangeLog"
 distfiles="https://github.com/liberationfonts/liberation-fonts/archive/${version}.tar.gz"
-checksum=e76de918e7c98f4a992d2ab397196bde217d9aebc2ec305bf4d1d5bc765dbabc
+checksum=9a823ccb33c8a8a865e84b982bcdc44d03ba4914adb91e6000df035dc0e55936
 font_dirs="/usr/share/fonts/TTF"
 
+pre_build() {
+	make versionupdate
+}
+
 do_install() {
 	vmkdir usr/share/fonts/TTF
 	install -m644 ${pkgname}-${version}/*.ttf ${DESTDIR}/usr/share/fonts/TTF