toolchain: introduce BR2_TOOLCHAIN_HAS_BINUTILS_BUG_27597
On Nios II binutils it still present ld bug 27597 leading to a package
libgeos to fail building:
http://autobuild.buildroot.net/results/
a05fdf1958f93a206c5c66c7f636b6650683626d/http://autobuild.buildroot.net/results/c05/
c053b9e191b31f0b1f8f8c902b602e187f714dc0/
The bug was already reported and it's been updated:
https://sourceware.org/bugzilla/show_bug.cgi?id=27597
Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>