[binutils-gdb] common: cgen-mem/cgen-ops: fix extern inline handling

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 5a394431deb3745c04a74d2a109aca075f79afd6 ***

Author: Mike Frysinger <vapier@gentoo.org>
Branch: master
Commit: 5a394431deb3745c04a74d2a109aca075f79afd6

common: cgen-mem/cgen-ops: fix extern inline handling
With newer versions of gcc (5.x), the extern inline we're using with the
cgen-{mem,ops} modules no longer work.  Since this code really wants the
gnu inline semantics, use that attribute explicitly.