gitlab-ci: Enable building the ssh_server_fuzzer with clang

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>

.gitlab-ci.yml

@@ -413,7 +413,8 @@ tumbleweed/openssl_1.1.x/x86_64/clang:
     -DPICKY_DEVELOPER=ON
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DWITH_PCAP=ON
     -DKRB5_CONFIG=/usr/lib/mit/bin/krb5-config
-    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON .. &&
+    -DUNIT_TESTING=ON -DCLIENT_TESTING=ON -DSERVER_TESTING=ON
+    -DFUZZ_TESTING=ON .. &&
     make -j$(nproc) && ctest --output-on-failure
   tags:
   - shared