libcurl: security bump to version 7.61.1
Fixes CVE-2018-14618: NTLM password overflow via integer overflow
For more details, see the advisory:
https://curl.haxx.se/docs/CVE-2018-14618.html
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 87d58cccf19039fdca30ad5274ed75030919656d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>