[pkcs11] Fix up standalone modules for use in tests.
[pkcs11] Fix up standalone modules for use in tests.

 * Make the standalone modules always resident after loading.
 * Install modules to a path that's published in the pkg-config file.

stefwalter/gcr,stefwalter/gcr,Distrotech/gcr,Distrotech/gcr,stefwalter/gcr,Distrotech/gcr,stefwalter/gcr,Distrotech/gcr