qmake: Move FreeDesktop assets to a separate subproject

assets/assets.pro

@@ -0,0 +1,23 @@
+TEMPLATE = aux
+
+include($$SRC_ROOT/common.pri)
+
+unix:!macx {
+    TARGET = zeal
+    appicons16.files=freedesktop/appicons/16/*
+    appicons24.files=freedesktop/appicons/24/*
+    appicons32.files=freedesktop/appicons/32/*
+    appicons64.files=freedesktop/appicons/64/*
+    appicons128.files=freedesktop/appicons/128/*
+
+    appicons16.path=$$PREFIX/share/icons/hicolor/16x16/apps
+    appicons24.path=$$PREFIX/share/icons/hicolor/24x24/apps
+    appicons32.path=$$PREFIX/share/icons/hicolor/32x32/apps
+    appicons64.path=$$PREFIX/share/icons/hicolor/64x64/apps
+    appicons128.path=$$PREFIX/share/icons/hicolor/128x128/apps
+
+    desktop.files=freedesktop/zeal.desktop
+    desktop.path=$$PREFIX/share/applications
+
+    INSTALLS += appicons16 appicons24 appicons32 appicons64 appicons128 desktop
+}

src/src.pro

@@ -25,22 +25,6 @@ DESTDIR = $$BUILD_ROOT/bin
 
 unix:!macx {
     TARGET = zeal
-    appicons16.files=appicons/16/*
-    appicons24.files=appicons/24/*
-    appicons32.files=appicons/32/*
-    appicons64.files=appicons/64/*
-    appicons128.files=appicons/128/*
-
-    appicons16.path=$$PREFIX/share/icons/hicolor/16x16/apps
-    appicons24.path=$$PREFIX/share/icons/hicolor/24x24/apps
-    appicons32.path=$$PREFIX/share/icons/hicolor/32x32/apps
-    appicons64.path=$$PREFIX/share/icons/hicolor/64x64/apps
-    appicons128.path=$$PREFIX/share/icons/hicolor/128x128/apps
-
-    desktop.files=zeal.desktop
-    desktop.path=$$PREFIX/share/applications
-
-    INSTALLS += appicons16 appicons24 appicons32 appicons64 appicons128 desktop
 }
 
 win32 {

zeal.pro

@@ -9,9 +9,9 @@ lessThan(QT_VERSION, "5.2.0") {
 }
 
 TEMPLATE = subdirs
-CONFIG += ordered
 
 SUBDIRS += \
+    assets \
     src
 
 # Ease access to these files from Qt Creator