libcurl: security bump to version 7.60.0

Drop upstream patch.

This release fixes the security issues listed below.

CVE-2018-1000300: curl might overflow a heap based memory buffer when
closing down an FTP connection with very long server command replies.

  https://curl.haxx.se/docs/adv_2018-82c2.html

CVE-2018-1000301: curl can be tricked into reading data beyond the end
of a heap based buffer used to store downloaded content.

  https://curl.haxx.se/docs/adv_2018-b138.html

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 051e2f2d0b3a74ede4cc1865513ebe4c59e7d2ed)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libcurl/libcurl.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-# https://curl.haxx.se/download/curl-7.59.0.tar.xz.asc
-sha256 e44eaabdf916407585bf5c7939ff1161e6242b6b015d3f2f5b758b2a330461fc  curl-7.59.0.tar.xz
+# https://curl.haxx.se/download/curl-7.60.0.tar.xz.asc
+sha256 8736ff8ded89ddf7e926eec7b16f82597d029fc1469f3a551f1fafaac164e6a0  curl-7.60.0.tar.xz
 sha256 5f3849ec38ddb927e79f514bf948890c41b8d1407286a49609b8fb1585931095  COPYING

package/libcurl/libcurl.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBCURL_VERSION = 7.59.0
+LIBCURL_VERSION = 7.60.0
 LIBCURL_SOURCE = curl-$(LIBCURL_VERSION).tar.xz
 LIBCURL_SITE = https://curl.haxx.se/download
 LIBCURL_DEPENDENCIES = host-pkgconf \