Make sure we free any memory used for gdb_save_tdesc.
Change-Id: Ia226f6134318c8c6b0ac4fa20fe70a570a08d80d
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/1619
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>