package/libgeos: fix build failure due to missing -mcmodel=large

When building libgeos for or1k -mcmodel=large is needed to link, so let's
add that gcc option in case we're building for or1k.

Upstream gcc doesn't have the -mcmodel=large option for or1k, but all
released Buildroot gcc versions have the patch to add it, so that's
fine.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: Maxim Kochetkov <fido_max@inbox.ru>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/libgeos/libgeos.mk

@@ -23,6 +23,10 @@ ifeq ($(BR2_arm)$(BR2_armeb),y)
 LIBGEOS_CONF_OPTS += -DDISABLE_GEOS_INLINE=ON
 endif
 
+ifeq ($(BR2_or1k),y)
+LIBGEOS_CXXFLAGS += -mcmodel=large
+endif
+
 LIBGEOS_CONF_OPTS += -DCMAKE_CXX_FLAGS="$(LIBGEOS_CXXFLAGS)"
 
 $(eval $(cmake-package))