libevent: fix non-static build

package/libevent/Makefile

@@ -20,7 +20,9 @@ include $(ADK_TOPDIR)/mk/package.mk
 
 $(eval $(call PKG_template,LIBEVENT,libevent,$(PKG_VERSION)-${PKG_RELEASE},${PKG_DEPENDS},${PKG_DESCR},${PKG_SECTION},${PKG_OPTS}))
 
+ifeq ($(ADK_TARGET_USE_STATIC_LIBS),y)
 MAKE_FLAGS+=		LDFLAGS="$(TARGET_LDFLAGS) -all-static"
+endif
 
 libevent-install:
 	$(INSTALL_DIR) $(IDIR_LIBEVENT)/usr/lib