Fix universal MacOS CI build (#1106)

Do not build libomp, because it depends on cmake-bootstrap, which for some reason tries to execute a unit test compiled for arm64, which obviously fails on a x86_64 host.

.azure/azure-pipelines-mac.yml

@@ -115,29 +115,26 @@ jobs:
         path: '/opt/local'
         cacheHitVar: CACHE_RESTORED
     - script: |
-        set -x
+        set -ex
         export PATH=$PATH:/opt/local/bin
         echo $PATH
         which codesign
-        codesign --help
         which port
+        cmake --version || true
+
         echo "+universal" | sudo tee -a /opt/local/etc/macports/variants.conf
-        
+
         sudo sh -c 'cat << EOF >> /opt/local/etc/macports/macports.conf
         buildfromsource     	always
         universal_archs     	arm64 x86_64
         ui_interactive     		no
         EOF'
-        
-        sudo port deps glib2-devel
-        sudo port deps libsndfile
-        sudo port deps dbus-glib
-        sudo port deps libomp-devel
-        sudo port install glib2-devel libsndfile dbus-glib libomp-devel
-        # remove all extended attributes, as they cannot be restored when restoring the pipeline cache
-        sudo xattr -rcv /opt/local
+
+        sudo port install glib2-devel libsndfile dbus-glib readline
         # fixup permissions to allow non-priv pipeline user access every directory, to make the caching step succeed at the end
         sudo chown -R $(id -u):$(id -g) /opt/local
+        # remove all extended attributes, as they cannot be restored when restoring the pipeline cache
+        #sudo xattr -rcv /opt/local
       displayName: 'Port install universal'
       condition: and(succeeded(), ne(variables.CACHE_RESTORED, 'true'))
     - script: |
@@ -153,7 +150,11 @@ jobs:
         sudo port -v install fluidsynth +universal
       displayName: 'port install fluidsynth +universal'
       condition: failed()
+      enabled: false
     - script: |
+        set -x
+        cat /opt/local/var/macports/logs/*cmake-bootstrap/cmake-bootstrap/main.log
+        cat /opt/local/var/macports/build/*cmake-bootstrap/cmake-bootstrap/work/cmake-3.9.4-arm64/Bootstrap.cmk/*.log
         cat /opt/local/var/macports/logs/*_fluidsynth/fluidsynth/main.log
       condition: failed()
       displayName: 'Print fluidsynth error log'