community/libreoffice: Use gtk3

Improves HiDPI experience

community/libreoffice/APKBUILD

@@ -3,7 +3,7 @@
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=libreoffice
 pkgver=5.3.4.2
-pkgrel=1
+pkgrel=2
 pkgdesc="LibreOffice - Meta package for the full office suite"
 url="http://www.libreoffice.org/"
 arch="all"
@@ -14,7 +14,7 @@ depends_dev="cups-dev libjpeg-turbo-dev boost-dev clucene-dev libe-book-dev icu-
 	libxslt-dev postgresql-dev mdds-dev glm-dev glu-dev glew-dev vigra-dev
 	unixodbc-dev openldap-dev libressl-dev nss-dev npapi-sdk hunspell-dev
 	libxrender-dev libxrandr-dev neon-dev apr-dev redland-dev libexttextcat-dev
-	gconf-dev bluez-dev gstreamer-dev gst-plugins-base-dev gtk+2.0-dev
+	gconf-dev bluez-dev gstreamer-dev gst-plugins-base-dev gtk+3.0-dev
 	poppler-dev cairo-dev hyphen-dev mythes-dev python3-dev harfbuzz-dev
 	libfreehand-dev libodfgen-dev libcdr-dev libzmf-dev libstaroffice-dev
 	liborcus-dev openjdk8 apache-ant junit"
@@ -251,6 +251,8 @@ build() {
 		--disable-lpsolve \
 		--disable-gltf \
 		--disable-liblangtag \
+		--disable-gtk \
+		--enable-gtk3 \
 		|| return 1
 	# adding '-isystem /usr/include' make things break with gcc6
 	# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823145