Do not compile in Arch Linux
Failed to compile git master using gcc version 7.1.1. Error bellow.
[ 21%] Building CXX object kadu-core/CMakeFiles/libkadu.dir/plugin/dependency-graph/plugin-dependency-graph-builder.cpp.o
In file included from kadu/kadu-core/plugin/dependency-graph/plugin-dependency-graph-builder.cpp:20:0:
kadu/kadu-core/plugin/dependency-graph/plugin-dependency-graph-builder.h:60:31:
error: ‘function’ in namespace ‘std’ does not name a template type
using PluginFilter = std::function<QSet<QString>(PluginDependencyGraph &)>;
^~~~~~~~