travis: install glib-networking

Glib TLS support is required to run some of the tests

extra/travis-build

@@ -39,7 +39,8 @@ deps_fedora() {
         gnutls-devel \
         libnotify-devel \
         at-spi2-core-devel \
-        gtk3-devel
+        gtk3-devel \
+        glib-networking
 }
 
 deps_opensuse() {
@@ -57,7 +58,8 @@ deps_opensuse() {
         gnutls-devel \
         libnotify-devel \
         at-spi2-core-devel \
-        gtk3-devel
+        gtk3-devel \
+        glib-networking
 }
 
 deps_archlinux() {
@@ -76,7 +78,8 @@ deps_archlinux() {
            libnotify \
            at-spi2-core \
            gtk3 \
-           gnutls
+           gnutls \
+           glib-networking
 }
 
 deps_ubuntu() {
@@ -90,8 +93,8 @@ deps_ubuntu() {
             libgee-0.8-dev \
             libgnutls28-dev \
             libnotify-dev \
-            libgtk-3-dev
-
+            libgtk-3-dev \
+            glib-networking
 }
 
 install_deps() {