Fix target_link_libraries to use LINK_PRIVATE.

We can no longer mix plain and keyword target_link_libraries. This fixes that
issue.

Change-Id: Ib3a3fecec875ea985561a6bc73e63a99c5d8eda7
Merge topic 'fix_windows_target_link_issue' into next

0dfc6d7 Fix target_link_libraries to use LINK_PRIVATE.