libnl: Disable debug support

This dereses the size of the libnl pakcage a little bit
old:
   857 bin/packages/mips_24kc/base/libnl_3.4.0-1_mips_24kc.ipk
 41195 bin/packages/mips_24kc/base/libnl-core_3.4.0-1_mips_24kc.ipk
  7818 bin/packages/mips_24kc/base/libnl-genl_3.4.0-1_mips_24kc.ipk
 24322 bin/packages/mips_24kc/base/libnl-nf_3.4.0-1_mips_24kc.ipk
136075 bin/packages/mips_24kc/base/libnl-route_3.4.0-1_mips_24kc.ipk

new:
   852 bin/packages/mips_24kc/base/libnl_3.4.0-1_mips_24kc.ipk
 35020 bin/packages/mips_24kc/base/libnl-core_3.4.0-1_mips_24kc.ipk
  7615 bin/packages/mips_24kc/base/libnl-genl_3.4.0-1_mips_24kc.ipk
 24114 bin/packages/mips_24kc/base/libnl-nf_3.4.0-1_mips_24kc.ipk
131134 bin/packages/mips_24kc/base/libnl-route_3.4.0-1_mips_24kc.ipk

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/libs/libnl/Makefile

@@ -80,6 +80,9 @@ endef
 
 TARGET_CFLAGS += -ffunction-sections $(FPIC)
 
+CONFIGURE_ARGS += \
+	--disable-debug
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include/libnl3 $(1)/usr/lib/pkgconfig
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/libnl3/* $(1)/usr/include/libnl3/