On mips target, binutils currently sets DT_MIPS_RLD_MAP to 0 in dynamic
section if a --version-script sets _RLD_MAP to local. This is apparently
a binutils bug, but libc shouldn't segfault in this case.
Add sanity check on the entry to avoid segfault, fixes [BUGID #287].
Signed-off-by: Qing He <qing.he@intel.com>
Qing He