glib: handle failing getauxval(AT_SECURE)

glib: handle failing getauxval(AT_SECURE)

Don't bail out with error if getauxval(AT_SECURE) fails.
Instead, set the result of checking suid to FALSE (no suid).

Apparently, Tizen is built with qemu version < 2.12.

qemu 2.12 introduces providing AT_SECURE in auxiliary vector,
and the only purpose of using getauxval in glib is to get AT_SECURE.

If g_check_setuid() bails out with error, some packages may not build,
as their building process requires executing tools that call g_check_setuid().

As stated in commit a7fefb0e4e, getauxval(AT_SECURE) should always success...

This commit may be reverted if all the builds are made within qemu >= 2.12.

Change-Id: I7d0ee9745fea35e9d9337ccffaf5234b2211be02