package: don't bother with the tests on Emscripten at all.

They are slow to link and are always failing anyway.

package/ci/jenkins-emscripten.xml

@@ -69,7 +69,6 @@ cmake .. \
     -DCMAKE_TOOLCHAIN_FILE="../toolchains/generic/Emscripten.cmake" \
     -DCMAKE_FIND_ROOT_PATH=${JENKINS_HOME}/filesystem/emscripten-${compatibility} \
     -DCMAKE_INSTALL_PREFIX=${JENKINS_HOME}/filesystem/emscripten-${compatibility} \
-    -DBUILD_TESTS=ON \
     -DBUILD_DEPRECATED=${deprecated_build_flag} \
   `#-DWITH_AUDIO=ON` \
     -DWITH_SDL2APPLICATION=ON \
@@ -81,7 +80,6 @@ cmake .. \
     -G Ninja
 
 ninja
-ctest --output-on-failure || true
 ninja install
 ]]>
     </command>