package/libcurl: security bump to version 7.77.0

package/libcurl: security bump to version 7.77.0

Fixes the following security issues:

- CVE-2021-22897: schannel cipher selection surprise
  https://curl.se/docs/CVE-2021-22897.html

- CVE-2021-22898: TELNET stack contents disclosure
  https://curl.se/docs/CVE-2021-22898.html

- CVE-2021-22901: TLS session caching disaster
  https://curl.se/docs/CVE-2021-22901.html

Unconditionally disable the ldap(s) options.  These require external
libraries, but the options were ignored if the needed libraries weren't
available. This is now changed to be a fatal error since

https://github.com/curl/curl/commit/dae382a1a1481a94b708c82d5aa9fa7253084160

Additionally, add a post-7.77.0 upstream patch to fix compilation with
bearssl.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[yann.morin.1998@free.fr: annotate the patch, that it is a backport]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>