Fix travis build

.travis/build.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -x
+set -e
+
+BUNDLE="gtk-3.18.1-2"
+WD="$PWD"
+cd "$HOME"
+git clone https://github.com/gkoz/gtk-bootstrap.git
+cd gtk-bootstrap
+./bootstrap.sh "$WD/.travis/manifest.txt"
+cd "$WD"
+export PKG_CONFIG_PATH="$HOME/local/lib/pkgconfig"
+
+travis-cargo build

.travis/manifest.txt

@@ -0,0 +1,13 @@
+https://dbus.freedesktop.org/releases/dbus/dbus-1.11.14.tar.gz
+https://launchpad.net/intltool/trunk/0.51.0/+download/intltool-0.51.0.tar.gz
+https://github.com/anholt/libepoxy/releases/download/1.4.3/libepoxy-1.4.3.tar.xz
+https://www.freedesktop.org/software/fontconfig/release/fontconfig-2.12.4.tar.gz
+https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-1.4.6.tar.bz2
+https://download.gnome.org/sources/glib/2.53/glib-2.53.3.tar.xz
+https://download.gnome.org/sources/atk/2.25/atk-2.25.2.tar.xz
+https://download.gnome.org/sources/at-spi2-core/2.25/at-spi2-core-2.25.4.tar.xz
+https://download.gnome.org/sources/at-spi2-atk/2.25/at-spi2-atk-2.25.3.tar.xz
+https://www.cairographics.org/releases/cairo-1.14.10.tar.xz
+https://download.gnome.org/sources/pango/1.40/pango-1.40.6.tar.xz
+https://download.gnome.org/sources/gdk-pixbuf/2.36/gdk-pixbuf-2.36.6.tar.xz
+https://download.gnome.org/sources/gtk+/3.22/gtk+-3.22.16.tar.xz