Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qtsingleapplication/files/2.6.1_p20130904-no-gui.patch

@@ -0,0 +1,67 @@
+From f66352d6c2918123466bd72aee2118b9167562af Mon Sep 17 00:00:00 2001
+From: Davide Pesavento <davidepesa@gmail.com>
+Date: Sat, 28 Dec 2013 16:43:18 +0100
+Subject: [PATCH] no gui
+
+---
+ buildlib/buildlib.pro           |  4 +++-
+ src/qtsingleapplication.pri     | 11 +++++------
+ src/qtsinglecoreapplication.pri |  2 +-
+ 3 files changed, 9 insertions(+), 8 deletions(-)
+
+diff --git a/buildlib/buildlib.pro b/buildlib/buildlib.pro
+index 37dddcd..f7c6508 100644
+--- a/buildlib/buildlib.pro
++++ b/buildlib/buildlib.pro
+@@ -2,7 +2,9 @@ TEMPLATE=lib
+ CONFIG += qt dll qtsingleapplication-buildlib
+ mac:CONFIG += absolute_library_soname
+ win32|mac:!wince*:!win32-msvc:!macx-xcode:CONFIG += debug_and_release build_all
+-include(../src/qtsingleapplication.pri)
++include(../common.pri)
++include(../src/qtsinglecoreapplication.pri)
++exists(../config.pri):!infile(../config.pri, QTSA_NO_GUI, yes):include(../src/qtsingleapplication.pri)
+ TARGET = $$QTSINGLEAPPLICATION_LIBNAME
+ DESTDIR = $$QTSINGLEAPPLICATION_LIBDIR
+ win32 {
+diff --git a/src/qtsingleapplication.pri b/src/qtsingleapplication.pri
+index 02c9e5b..772924d 100644
+--- a/src/qtsingleapplication.pri
++++ b/src/qtsingleapplication.pri
+@@ -1,15 +1,14 @@
+-include(../common.pri)
+-INCLUDEPATH += $$PWD
+-DEPENDPATH += $$PWD
+-QT *= network
++INCLUDEPATH *= $$PWD
++DEPENDPATH *= $$PWD
++QT *= gui network
+ greaterThan(QT_MAJOR_VERSION, 4): QT *= widgets
+ CONFIG *= qtlockedfile
+ 
+ qtsingleapplication-uselib:!qtsingleapplication-buildlib {
+     LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME
+ } else {
+-    SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp
+-    HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h
++    SOURCES += $$PWD/qtsingleapplication.cpp
++    HEADERS += $$PWD/qtsingleapplication.h
+ }
+ 
+ win32 {
+diff --git a/src/qtsinglecoreapplication.pri b/src/qtsinglecoreapplication.pri
+index f5b8414..bf14a3f 100644
+--- a/src/qtsinglecoreapplication.pri
++++ b/src/qtsinglecoreapplication.pri
+@@ -3,7 +3,7 @@ DEPENDPATH      += $$PWD
+ HEADERS		+= $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h
+ SOURCES		+= $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp
+ 
+-QT *= network
++QT = core network
+ CONFIG *= qtlockedfile
+ 
+ win32:contains(TEMPLATE, lib):contains(CONFIG, shared) {
+-- 
+1.8.5.2
+