Fix doctest/nbtest_pyfaust ci job error of missing fdb subpkg (#337).

.gitlab-ci.yml

@@ -182,8 +182,11 @@ ctest_nightly_win10:
     - echo $PF_DIR
     - md5sum $PF_DIR/*py
     - cp -f wrapper/python/pyfaust/*py $PF_DIR/
-    - md5sum $PF_DIR/*py
+    # handle special case of pyfaust subpackages
+    - for SDIR in $(find wrapper/python/pyfaust -type d -mindepth 1); do mkdir $PF_DIR/$(basename $SDIR); cp -f $SDIR/*py $PF_DIR/$(basename $SDIR)/; done || exit 0
+    - md5sum $(find $PF_DIR -name "*.py")
     - export PF_DIR=$PF_DIR # just in case
+    # TODO: this job is long enough to become a separate script
   after_script:
     - deactivate
     - rm -Rf doctest_pyfaust-latest