gnome-shell: update to 3.18.5 + fix PIE

See #4572

srcpkgs/gnome-shell/template

@@ -1,9 +1,9 @@
 # Template file for 'gnome-shell'
 pkgname=gnome-shell
-version=3.18.4
-revision=3
+version=3.18.5
+revision=1
 build_style=gnu-configure
-configure_args="--disable-schemas-compile --disable-systemd LDFLAGS="
+configure_args="--disable-schemas-compile --disable-systemd"
 hostmakedepends="
  pkg-config intltool gnome-doc-utils $(vopt_if gir gobject-introspection) python3.4"
 makedepends="
@@ -21,7 +21,7 @@ maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://live.gnome.org/GnomeShell"
 license="GPL-2"
 distfiles="${GNOME_SITE}/$pkgname/${version%.*}/$pkgname-$version.tar.xz"
-checksum=d959c0aae4c10b194d1fa29e89d34d73a4d35d74f384bf604d78435bf9ced5d7
+checksum=6fc9cd8b43b1ca0669e1c5a9de092a67eea648e38585f0cdb960f08a16c6cb20
 
 build_options="gir"
 if [ -z "$CROSS_BUILD" ]; then