Update license to "LGPLv2+ and GPLv2+"

src/builder-utils.c has portions derived from GPLv2+ code, the rest is
LGPLv2+.

flatpak-builder.spec

@@ -4,10 +4,12 @@
 
 Name:           flatpak-builder
 Version:        0.99.3
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Tool to build flatpaks from source
 
-License:        LGPLv2+
+# src/builder-utils.c has portions derived from GPLv2+ code,
+# the rest is LGPLv2+
+License:        LGPLv2+ and GPLv2+
 URL:            http://flatpak.org/
 Source0:        https://github.com/flatpak/flatpak-builder/releases/download/%{version}/%{name}-%{version}.tar.xz
 
@@ -83,6 +85,9 @@ autoreconf -fi
 
 
 %changelog
+* Mon Aug 13 2018 Kalev Lember <klember@redhat.com> - 0.99.3-4
+- Update license to "LGPLv2+ and GPLv2+"
+
 * Tue Jul 31 2018 Florian Weimer <fweimer@redhat.com> - 0.99.3-3
 - Rebuild with fixed binutils