print.c: Fix multiline support.

 - Use the reentrant tokenizer version strtok_r to break up vendor and model
   names in print.c.
 - Add implementation of strtok_r for mingw (strtok_r is POSIX only).
 - Free allocated temporary memory again.

Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

git-svn-id: svn://coreboot.org/flashrom/trunk@1700 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1