Check leaked global symbols under more various conditions

.github/workflows/compilers.yml

@@ -185,6 +185,7 @@ jobs:
       - run: $make extract-extlibs
       - run: $make incs
       - run: $make
+      - run: $make leaked-globals
       - run: $make test
       - run: $make install
         if: "matrix.entry.name == '-O3'"

.github/workflows/mingw.yml

@@ -86,6 +86,8 @@ jobs:
           $jobs = [int](2 * $env:NUMBER_OF_PROCESSORS)
           make -j $jobs
 
+      - run: make leaked-globals
+
       - name: make install
         run: |
           # Actions uses UTF8, causes test failures, similar to normal OS setup