curl: update to version 7.51.0

This fixes the following security problems:
CVE-2016-8615: cookie injection for other servers
CVE-2016-8616: case insensitive password comparison
CVE-2016-8617: OOB write via unchecked multiplication
CVE-2016-8618: double-free in curl_maprintf
CVE-2016-8619: double-free in krb5 code
CVE-2016-8620: glob parser write/read out of bounds
CVE-2016-8621: curl_getdate read out of bounds
CVE-2016-8622: URL unescape heap overflow via integer truncation
CVE-2016-8623: Use-after-free via shared cookies
CVE-2016-8624: invalid URL parsing with '#'
CVE-2016-8625: IDNA 2003 makes curl use wrong host

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:=7.50.3
+PKG_VERSION:=7.51.0
 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:=7b7347d976661d02c84a1f4d6daf40dee377efdc45b9e2c77dedb8acf140d8ec
+PKG_MD5SUM:=7f8240048907e5030f67be0a6129bc4b333783b9cca1391026d700835a788dde
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=COPYING

package/network/utils/curl/patches/200-no_docs_tests.patch

@@ -1,6 +1,6 @@
 --- a/Makefile.am
 +++ b/Makefile.am
-@@ -150,7 +150,7 @@ CLEANFILES = $(VC6_LIBDSP) $(VC6_SRCDSP)
+@@ -153,7 +153,7 @@ CLEANFILES = $(VC6_LIBDSP) $(VC6_SRCDSP)
  bin_SCRIPTS = curl-config
  
  SUBDIRS = lib src include
@@ -11,7 +11,7 @@
  pkgconfig_DATA = libcurl.pc
 --- a/Makefile.in
 +++ b/Makefile.in
-@@ -611,7 +611,7 @@ CLEANFILES = $(VC6_LIBDSP) $(VC6_SRCDSP)
+@@ -613,7 +613,7 @@ CLEANFILES = $(VC6_LIBDSP) $(VC6_SRCDSP)
  
  bin_SCRIPTS = curl-config
  SUBDIRS = lib src include

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

@@ -1,6 +1,6 @@
 --- a/lib/vtls/polarssl.c
 +++ b/lib/vtls/polarssl.c
-@@ -665,7 +665,7 @@ void Curl_polarssl_session_free(void *pt
+@@ -646,7 +646,7 @@ void Curl_polarssl_session_free(void *pt
  
  size_t Curl_polarssl_version(char *buffer, size_t size)
  {
@@ -11,7 +11,7 @@
                    version>>24, (version>>16)&0xff, (version>>8)&0xff);
 --- a/lib/vtls/mbedtls.c
 +++ b/lib/vtls/mbedtls.c
-@@ -713,7 +713,7 @@ void Curl_mbedtls_session_free(void *ptr
+@@ -712,7 +712,7 @@ void Curl_mbedtls_session_free(void *ptr
  
  size_t Curl_mbedtls_version(char *buffer, size_t size)
  {