jitterentropy: include license files

COPYING says
    ALTERNATIVELY, this product may be distributed under the terms of
    the GNU General Public License, in which case the provisions of the GPL2
    are required INSTEAD OF the above restrictions.  (This clause is
    necessary due to a potential bad interaction between the GPL and
    the restrictions contained in a BSD-style copyright.)
so license= field is not altered

Closes: #28073

srcpkgs/jitterentropy/template

@@ -1,7 +1,7 @@
 # Template file for 'jitterentropy'
 pkgname=jitterentropy
 version=3.0.1
-revision=1
+revision=2
 wrksrc="${pkgname}-library-${version}"
 build_style=gnu-makefile
 short_desc="Hardware RNG based on CPU timing jitter"
@@ -11,6 +11,12 @@ homepage="https://www.chronox.de/jent.html"
 distfiles="https://github.com/smuellerDD/jitterentropy-library/archive/v${version}.tar.gz"
 checksum=015a443ebfaab7bc302caa24dcc124aefe1818046893f49591d2465bd3f58e16
 
+post_install() {
+	vlicense COPYING
+	vlicense COPYING.bsd
+	vlicense COPYING.COPYING.gplv2
+}
+
 jitterentropy-devel_package() {
 	short_desc+=" - development files"
 	depends="${sourcepkg}>=${version}_${revision}"