make gconfig: fix build on Fedora-13

Closes #2095

Avoids error like:
/usr/bin/ld: /dot-dot-dot/buildroot/output/build/buildroot-config/kconfig_load.o: undefined reference to symbol 'dlsym@@GLIBC_2.2.5'

Need to add -ldl to list of GTK2 development libraries.

Signed-off-by: Slava Zanko <slavazanko@gmail.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

CHANGES

@@ -44,6 +44,7 @@
 	#1999: Typo in path checking
 	#2035: ipsec-tools-0.7.2 fails to build with gcc-4.4.x
 	#2038: Bump ncurses to 5.7
+	#2095: make gconfig: undefined reference to symbol 'dlsym@@GLIBC_2.2.5'
 
 2010.05, Released May 30th, 2010:
 

package/config/Makefile.kconfig

@@ -179,7 +179,7 @@ HOSTCFLAGS_zconf.tab.o	:= -I$(src)
 HOSTLOADLIBES_qconf	= $(KC_QT_LIBS) -ldl
 HOSTCXXFLAGS_qconf.o	= $(KC_QT_CFLAGS) -D LKC_DIRECT_LINK
 
-HOSTLOADLIBES_gconf	= `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0`
+HOSTLOADLIBES_gconf	= `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0` -ldl
 HOSTCFLAGS_gconf.o	= `pkg-config --cflags gtk+-2.0 gmodule-2.0 libglade-2.0` \
                           -D LKC_DIRECT_LINK