Including:

* expanding STDAPI to its definition (as per
  <https://msdn.microsoft.com/library/ms686631(vs.85).aspx> "STDAPI"), to add
  __declspec(dllexport) into its middle, in
  extensions/source/activex/so_activex.cxx; as discussed in the comments at
  <https://gerrit.libreoffice.org/#/c/60691/> "Get rid of Windows .def files in
  setup_native, use __declspec(dllexport)", having a function both listed in a
  .def file EXPORTS and marking it dllexport is OK, and the latter helps the
  heuristics of loplugin:external; however, the relevant functions in
  extensions/source/activex/so_activex.cxx probably don't even need to be
  exported in the first place?

* follow-up loplugin:salcall in sal/osl/w32/file-impl.hxx

Change-Id: Ida6e17eba19cfa3d7e5c72dda57409005c0a0191
Reviewed-on: https://gerrit.libreoffice.org/60938
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>