Fix GH-14888: README.REDIST.BINS refers to non-existing LICENSE [ci skip]

The LICENSE file of libmagic had been inadvertently removed when the
lib had been upgraded to 5.43.  So we add the file `COPYING` from that
release[1], and rename it to `LICENSE`.

[1] <https://github.com/file/file/releases/tag/FILE5_43>

Closes GH-14917.

Author: cmb69

NEWS

@@ -14,6 +14,10 @@ PHP                                                                        NEWS
 - Dom:
   . Fixed bug GH-14702 (DOMDocument::xinclude() crash). (nielsdos)
 
+- Fileinfo:
+  . Fixed bug GH-14888 (README.REDIST.BINS refers to non-existing LICENSE).
+    (cmb)
+
 - Gd:
   . ext/gd/tests/gh10614.phpt: skip if no PNG support. (orlitzky)
 

ext/fileinfo/libmagic/LICENSE

@@ -0,0 +1,29 @@
+$File: COPYING,v 1.2 2018/09/09 20:33:28 christos Exp $
+Copyright (c) Ian F. Darwin 1986, 1987, 1989, 1990, 1991, 1992, 1994, 1995.
+Software written by Ian F. Darwin and others;
+maintained 1994- Christos Zoulas.
+
+This software is not subject to any export provision of the United States
+Department of Commerce, and may be exported to any country or planet.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice immediately at the beginning of the file, without modification,
+   this list of conditions, and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.