Merge pull request 'Android build: Use libetpan foundation gitea instead of github' (#12) from android-build into Release_2.1

Reviewed-on: #12

android/external/Makefile.conf

@@ -19,7 +19,7 @@ GMP_VERSION=6.2.1
 NETTLE_VERSION=3.7.3
 
 ### Git deps repos
-EXTERNAL_GIT_REPOS += libetpan|https://github.com/fdik/libetpan.git?HEAD
+EXTERNAL_GIT_REPOS += libetpan|https://gitea.pep.foundation/pEp.foundation/libetpan.git?0123f34ec4ef7711b3670b744b3ae7e97178afe1
 EXTERNAL_GIT_REPOS += sequoia|https://gitlab.com/sequoia-pgp/sequoia.git?openpgp/v1.3.0
 
 ### Common variables