package/fontconfig: break circular dependency

Build fails because of the following circular dependency:

fontconfig -> util-linux -> udev -> systemd -> polkit ->
gobject-introspection -> cairo -> fontconfig

which results in the following build failure:

checking for UUID... no
checking where uuid functions comes from... configure: error:
*** uuid is required. install util-linux.

To break it, apply the same ugly workaround that was applied for
libglib2 and cryptsetup until a better solution is found:
https://patchwork.ozlabs.org/project/buildroot/patch/20201101150619.1709959-1-fontaine.fabrice@gmail.com/

Fixes:
 - http://autobuild.buildroot.org/results/2c6ef073e7e98e13daa409e1ea6130e9abd32c87

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/fontconfig/fontconfig.mk

@@ -10,7 +10,8 @@ FONTCONFIG_SOURCE = fontconfig-$(FONTCONFIG_VERSION).tar.bz2
 # 0002-add-pthread-as-a-dependency-of-a-static-lib.patch
 FONTCONFIG_AUTORECONF = YES
 FONTCONFIG_INSTALL_STAGING = YES
-FONTCONFIG_DEPENDENCIES = freetype expat host-pkgconf host-gperf util-linux
+FONTCONFIG_DEPENDENCIES = freetype expat host-pkgconf host-gperf \
+	$(if $(BR2_PACKAGE_UTIL_LINUX_LIBS),util-linux-libs,util-linux)
 HOST_FONTCONFIG_DEPENDENCIES = \
 	host-freetype host-expat host-pkgconf host-gperf host-util-linux
 FONTCONFIG_LICENSE = fontconfig license