Check that there are no library modules that use the old "sp" symbol instead

of "c_sp".

.github/workflows/build-on-pull-request.yml

@@ -39,6 +39,9 @@ jobs:
       - name: Build the platform libraries.
         shell: bash
         run: make -j2 lib QUIET=1
+      - name: check test that no modules use sp
+        shell: bash
+        run: make -j2 checksp QUIET=1             
       - name: Run the regression tests.
         shell: bash
         run: make -j2 test QUIET=1