package/host-gdb: disable source-highlight

This is the follow-up commit to the 4de60e4 which disables
sourcehighlight dependency for the target GDB package.
Do the same for the host variant to be sure that this
won't be picked up from the host system.

Signed-off-by: Bartosz Bilas <b.bilas@grinn-global.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/gdb/gdb.mk

@@ -255,6 +255,7 @@ HOST_GDB_CONF_OPTS = \
 	--with-system-zlib \
 	--with-curses \
 	--without-mpfr \
+	--disable-source-highlight \
 	$(GDB_DISABLE_BINUTILS_CONF_OPTS)
 
 ifeq ($(BR2_PACKAGE_HOST_GDB_TUI),y)