Fix gstd_chmod.sh DESTDIR path.
Fix gstd_chmod.sh DESTDIR path.

This should fix the chmod path when cross compiling.

Signed-off-by: James Hilliard <4395f5c27a06f75bcfb2ccc3a75499e00c2b3c88@gmail.com>

RidgeRun/gstd-1.x,RidgeRun/gstd-1.x,RidgeRun/gstd-1.x,RidgeRun/gstd-1.x