[z2271] Fix CMake ExternalProject_Add command for ACE on UNIX systems

(based on commit [12379] - 8cfd615)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>

(based on commit [s1911] - bc9a398)

Signed-off-by: Xfurry <xfurry@scriptdev2.com>