Disable tests on static bionic

It's failing to link with LTO on bionic because of an internal compiler
error for some random reason, so just disable building the tests there
for now (keeping LTO on is more useful since that is also what gets used
for a static build).

.drone.jsonnet

@@ -22,6 +22,7 @@ local debian_pipeline(name, image,
         cmake_extra='',
         extra_cmds=[],
         jobs=6,
+        tests=true,
         loki_repo=false,
         allow_fail=false) = {
     kind: 'pipeline',
@@ -55,10 +56,12 @@ local debian_pipeline(name, image,
                 'cmake .. -DWITH_SETCAP=OFF -DCMAKE_CXX_FLAGS=-fdiagnostics-color=always -DCMAKE_BUILD_TYPE='+build_type+' ' +
                     (if werror then '-DWARNINGS_AS_ERRORS=ON ' else '') +
                     '-DWITH_LTO=' + (if lto then 'ON ' else 'OFF ') +
+                    (if tests then '' else '-DWITH_TESTS=OFF ') +
                 cmake_extra,
                 'VERBOSE=1 make -j' + jobs,
-                '../contrib/ci/drone-gdb.sh ./test/testAll --use-colour yes',
-            ] + extra_cmds,
+            ]
+            + (if tests then ['../contrib/ci/drone-gdb.sh ./test/testAll --use-colour yes'] else [])
+            + extra_cmds,
         }
     ],
 };
@@ -253,7 +256,7 @@ local mac_builder(name,
     ]),
 
     // Static build (on bionic) which gets uploaded to builds.lokinet.dev:
-    debian_pipeline("Static (bionic amd64)", docker_base+'ubuntu-bionic', deps='g++-8 python3-dev automake libtool', lto=true,
+    debian_pipeline("Static (bionic amd64)", docker_base+'ubuntu-bionic', deps='g++-8 python3-dev automake libtool', lto=true, tests=false,
                     cmake_extra='-DBUILD_STATIC_DEPS=ON -DBUILD_SHARED_LIBS=OFF -DSTATIC_LINK=ON -DCMAKE_C_COMPILER=gcc-8 -DCMAKE_CXX_COMPILER=g++-8 ' +
                         '-DCMAKE_CXX_FLAGS="-march=x86-64 -mtune=haswell" -DCMAKE_C_FLAGS="-march=x86-64 -mtune=haswell" -DNATIVE_BUILD=OFF ' +
                         '-DWITH_SYSTEMD=OFF',