use versioned soname

--- ./common.pri.orig	2016-04-13 01:52:30.218251289 +0300
+++ ./common.pri	2016-04-13 01:52:30.218251289 +0300
@@ -4,11 +4,11 @@
 greaterThan(QT_MAJOR_VERSION, 5)|\
   if(equals(QT_MAJOR_VERSION, 5):greaterThan(QT_MINOR_VERSION, 4))|\
   if(equals(QT_MAJOR_VERSION, 5):equals(QT_MINOR_VERSION, 4):greaterThan(QT_PATCH_VERSION, 1)) {
-    QTSINGLEAPPLICATION_LIBNAME = $$qt5LibraryTarget(QtSolutions_SingleApplication-head)
-    QTSINGLECOREAPPLICATION_LIBNAME = $$qt5LibraryTarget(QtSolutions_SingleCoreApplication-head)
+    QTSINGLEAPPLICATION_LIBNAME = $$qt5LibraryTarget(QtSolutions_SingleApplication-2.6)
+    QTSINGLECOREAPPLICATION_LIBNAME = $$qt5LibraryTarget(QtSolutions_SingleCoreApplication-2.6)
 } else {
-    QTSINGLEAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleApplication-head)
-    QTSINGLECOREAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleCoreApplication-head)
+    QTSINGLEAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleApplication-2.6)
+    QTSINGLECOREAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleCoreApplication-2.6)
 }
 TEMPLATE -= fakelib