Fix redefinition of _GNU_SOURCE.
libc/misc/getloadavg/getloadavg.c:26: warning: "_GNU_SOURCE" redefined
26 | #define _GNU_SOURCE
|
In file included from <command-line>:
./include/libc-symbols.h:52: note: this is the location of the previous definition
52 | #define _GNU_SOURCE 1
Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>