cirrus.yml: Update the FreeBSD task to version 12.2

FreeBSD version 12.1 is out of service now, and the task in the
Cirrus-CI is failing. Update to 12.2 to get it working again.
Unfortunately, there is a bug in libtasn1 that triggers with the
new version of Clang that is used there (see this thread for details:
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg00739.html

 ),
so we have to disable gnutls for now to make it work again. We can
enable it later again once libtasn1 has been fixed in FreeBSD.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20210319101402.48871-1-thuth@redhat.com>
Message-Id: <20210323165308.15244-13-alex.bennee@linaro.org>

.cirrus.yml

@@ -3,7 +3,7 @@ env:
 
 freebsd_12_task:
   freebsd_instance:
-    image_family: freebsd-12-1
+    image_family: freebsd-12-2
     cpu: 8
     memory: 8G
   install_script:
@@ -13,7 +13,10 @@ freebsd_12_task:
   script:
     - mkdir build
     - cd build
-    - ../configure --enable-werror || { cat config.log meson-logs/meson-log.txt; exit 1; }
+    # TODO: Enable gnutls again once FreeBSD's libtasn1 got fixed
+    # See: https://gitlab.com/gnutls/libtasn1/-/merge_requests/71
+    - ../configure --enable-werror --disable-gnutls
+      || { cat config.log meson-logs/meson-log.txt; exit 1; }
     - gmake -j$(sysctl -n hw.ncpu)
     - gmake -j$(sysctl -n hw.ncpu) check V=1