[Nel] ppc build

[nik gaffney]

ok,. so nel (from yesterdays cvs) compiles + installs fine on debian-ppc with 
only a little change to time_nl.cpp. for the moment, it just fudges a return 
value to CTime::getPerformanceTime

specifcally here ->

#else // NL_OS_WINDOWS
        unsigned long long int x;
        __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
        return x;
#endif // NL_OS_WINDOWS

what is this line of asm actually doing?+
 and could it also be done in c?

nk