Fix Linux endianess detection
Fix Linux endianess detection

Just use glibc's/gcc's predefined macro to determine endianess.

Original patch from pth@suse.de, slightly cleaned up.

Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe,Sp1l/pwsafe