add licensing breakdown

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

fish.spec

@@ -3,7 +3,20 @@ Version:        2.7.1
 Release:        1%{?dist}
 Summary:        Friendly interactive shell
 
-License:        GPLv2
+# GPLv2
+#   - src/fish.cpp
+#   and rest..
+# GPLv2+
+#   - src/builtin_printf.cpp
+# BSD
+#   - share/tools/create_manpage_completions.py
+# ISC
+#   - src/utf8.cpp
+#   - src/utf8.h
+# LGPLv2+
+#   - src/wgetopt.c
+#   - src/wgetopt.h
+License:        GPLv2 and BSD and ISC and LGPLv2+
 URL:            https://fishshell.com
 Source0:        https://github.com/fish-shell/fish-shell/releases/download/%{version}/%{name}-%{version}.tar.gz