Android API 8 compilation errors

[Po Lu]

The latest Gnulib getloadavg.c does not compile on Android API 8, with
the NDK r10c:

  CC       getloadavg.o
getloadavg.c: In function 'rpl_getloadavg':
getloadavg.c:509:5: error: implicit declaration of function 'sysinfo' 
[-Werror=implicit-function-declaration]
     if (sysinfo (&info) < 0)
     ^

which function is not available till API level 13.