curl: update curl to version 7.47.0

This fixes the following security problems:

CVE-2016-0754: remote file name path traversal in curl tool for Windows
http://curl.haxx.se/docs/adv_20160127A.html

CVE-2016-0755: NTLM credentials not-checked for proxy connection re-use
http://curl.haxx.se/docs/adv_20160127B.html

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

SVN-Revision: 48614

package/network/utils/curl/patches/300-fix-disable-crypto-auth.patch

@@ -11,7 +11,7 @@
      unsigned char ntbuffer[0x18];
 --- a/lib/vtls/vtls.c
 +++ b/lib/vtls/vtls.c
-@@ -852,9 +852,9 @@ CURLcode Curl_ssl_md5sum(unsigned char *
+@@ -921,9 +921,9 @@ CURLcode Curl_ssl_md5sum(unsigned char *
                           unsigned char *md5sum, /* output */
                           size_t md5len)
  {