gnu: samba: Fix fcntl hint detection in configure script.

gnu: samba: Fix fcntl hint detection in configure script.

The configure script generates a C program to detect support for
lifetime hints on files.  But this program could crash, potentially
leaving a stale unreadable file behind which could cause the
patch-generated-file-shebang phase to fail.

Reported upstream <https://bugzilla.samba.org/show_bug.cgi?id=14503>.

* gnu/packages/patches/patches/samba-fix-fcntl-hint-detection.patch: New
file.
* gnu/packages/samba.scm (samba)[origin]: Add patch.
* gnu/local.mk (dist_patch_DATA): Register patch.