curl: update to version 7.50.3

This fixes the following security problems:
7.50.1:
 CVE-2016-5419 TLS session resumption client cert bypass
 CVE-2016-5420 Re-using connections with wrong client cert
 CVE-2016-5421 use of connection struct after free
7.50.2:
 CVE-2016-7141 Incorrect reuse of client certificates
7.50.3:
 CVE-2016-7167 curl escape and unescape integer overflows

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

package/network/utils/curl/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=curl
-PKG_VERSION:=7.50.0
+PKG_VERSION:=7.50.3
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@@ -18,7 +18,7 @@ PKG_SOURCE_URL:=http://curl.haxx.se/download/ \
 	ftp://ftp.planetmirror.com/pub/curl/ \
 	http://www.mirrormonster.com/curl/download/ \
 	http://curl.mirrors.cyberservers.net/download/
-PKG_MD5SUM:=9e463ff8fdc1b5daa81c850c514980ec
+PKG_MD5SUM:=7b7347d976661d02c84a1f4d6daf40dee377efdc45b9e2c77dedb8acf140d8ec
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=COPYING

package/network/utils/curl/patches/310-polarssl-disable-runtime-version-check.patch

@@ -11,7 +11,7 @@
                    version>>24, (version>>16)&0xff, (version>>8)&0xff);
 --- a/lib/vtls/mbedtls.c
 +++ b/lib/vtls/mbedtls.c
-@@ -705,7 +705,7 @@ void Curl_mbedtls_session_free(void *ptr
+@@ -713,7 +713,7 @@ void Curl_mbedtls_session_free(void *ptr
  
  size_t Curl_mbedtls_version(char *buffer, size_t size)
  {