t5000: silence unzip availability check
t5000: silence unzip availability check

unzip -v on (at least) Ubuntu prints a screenful of version info
to stdout.  Get rid of it since we only want to know if unzip is
installed or not.

Signed-off-by: Rene Scharfe <5c721353370dda279bee7751cb8d3ff68ef77242@lsrfire.ath.cx>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git