Some of the include files there had used

  #include "..."

while others had used

  #include <LibreOfficeKit/...>

for references among those include files.  In preparation for
loplugin:includeform, consolidate on the latter (even if that's clearly a
misuse of the <...> form).

Change-Id: If142c844863e4e63b6fd8f2200732972860befd3
Reviewed-on: https://gerrit.libreoffice.org/43558Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>