debug/gdb: fix for psim build failure due to -lz in gdb-7.2.
Signed-off-by: "Horst Kronstorfer" <horst.kronstorfer@aon.at>
[yann.morin.1998@anciens.enib.fr: fix space-damage]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
1 reporter_name="Yann E. MORIN"
2 reporter_url="http://ymorin.is-a-geek.org/dokuwiki/projects/crosstool"