Fix the License tags

The license of whole brltty is LGPLv2+ since the 5.6 release:
https://github.com/brltty/brltty/commit/16ccb7d13f0
http://brltty.com/pipermail/brltty/2018-March/015601.html

brltty.spec

@@ -22,8 +22,8 @@
 
 Name: brltty
 Version: %{pkg_version}
-Release: 3%{?dist}
-License: GPLv2+
+Release: 4%{?dist}
+License: LGPLv2+
 URL: http://mielke.cc/brltty/
 Source0: http://mielke.cc/brltty/archive/%{name}-%{version}.tar.xz
 Source1: brltty.service
@@ -55,7 +55,7 @@ Speech Dispatcher, please install also package %{name}-speech-dispatcher.
 
 %package speech-dispatcher
 Summary: Speech Dispatcher driver for BRLTTY
-License: GPLv2+
+License: LGPLv2+
 BuildRequires: speech-dispatcher-devel
 Requires: %{name}%{?_isa} = %{pkg_version}-%{release}
 %description speech-dispatcher
@@ -64,7 +64,7 @@ This package provides the Speech Dispatcher driver for BRLTTY.
 
 %package docs
 Summary: Documentation for BRLTTY
-License: GPLv2+
+License: LGPLv2+
 Requires: %{name} = %{pkg_version}-%{release}
 BuildArch: noarch
 %description docs
@@ -72,7 +72,7 @@ This package provides the documentation for BRLTTY.
 
 %package xw
 Summary: XWindow driver for BRLTTY
-License: GPLv2+
+License: LGPLv2+
 BuildRequires: libSM-devel libICE-devel libX11-devel libXaw-devel libXext-devel libXt-devel libXtst-devel
 Requires: %{name}%{?_isa} = %{pkg_version}-%{release}
 Requires: xorg-x11-fonts-misc, ucs-miscfixed-fonts
@@ -81,16 +81,14 @@ This package provides the XWindow driver for BRLTTY.
 
 %package at-spi2
 Summary: AtSpi2 driver for BRLTTY
-# The data files are licensed under LGPLv2+, see the README file.
-License: GPLv2+ and LGPLv2+
+License: LGPLv2+
 Requires: %{name}%{?_isa} = %{pkg_version}-%{release}
 %description at-spi2
 This package provides the AtSpi2 driver for BRLTTY.
 
 %package espeak
 Summary: eSpeak driver for BRLTTY
-# The data files are licensed under LGPLv2+, see the README file.
-License: GPLv2+ and LGPLv2+
+License: LGPLv2+
 Requires: %{name}%{?_isa} = %{pkg_version}-%{release}
 %description espeak
 This package provides the eSpeak driver for BRLTTY.
@@ -442,6 +440,10 @@ fi
 %endif
 
 %changelog
+* Tue Mar 06 2018 Ondřej Lysoněk <olysonek@redhat.com> - 5.6-4
+- Fix the License tags. The license of whole brltty is LGPLv2+ since
+  the 5.6 release.
+
 * Mon Feb 26 2018 Ondřej Lysoněk <olysonek@redhat.com> - 5.6-3
 - Fix generating the brltty-debugsource package