getdns: remove libbsd dependency

Signed-off-by: Guo Li <uxgood.org@gmail.com>

libs/getdns/Makefile

@@ -36,7 +36,7 @@ define Package/getdns
 	SECTION:=libs
 	CATEGORY:=Libraries
 	TITLE+= (library)
-	DEPENDS+= +libopenssl +libbsd +!GETDNS_ENABLE_STUB_ONLY:libunbound +GETDNS_ENABLE_IDN_LIBIDN2:libidn2
+	DEPENDS+= +libopenssl +!GETDNS_ENABLE_STUB_ONLY:libunbound +GETDNS_ENABLE_IDN_LIBIDN2:libidn2
 	MENU:=1
 endef
 
@@ -55,6 +55,8 @@ CONFIGURE_ARGS += \
 		$(if $(CONFIG_GETDNS_ENABLE_IDN_LIBIDN2), , --without-libidn2 ) \
 		--with-ssl="$(STAGING_DIR)/usr" \
 
+CONFIGURE_VARS += LIBBSD_LIBS=-lc
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include/getdns/
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/getdns/getdns*.h $(1)/usr/include/getdns/