Log Message:
The dependency compiler of libtool uses predictable temporary file names
when creating the output dependency file. This is normally not a problem
as libtool internally serializes the access. But when a package like
games/scid wants to compile the same file both for a library archive and
for the main program, two libtool invocations can happen at the same
time and therefore, two depcomp invocations as well. Include the PID in
the name of the temporary file to avoid this problem. Bump libtool-base
revision.