qbs project: Add properties for pulling in additional resources.

We need this to build plugins located outside the source tree.

Change-Id: Ie587b5e838bf0ce67b19d3222bbc40b53b888e69
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

qtcreator.qbs

@@ -13,6 +13,9 @@ Project {
     property path ide_source_tree: path
     property string ide_app_path: qbs.targetOS.contains("osx") ? "" : "bin"
     property string ide_app_target: qbs.targetOS.contains("osx") ? "Qt Creator" : "qtcreator"
+    property pathList additionalPlugins: []
+    property pathList additionalLibs: []
+    property pathList additionalTools: []
     property string ide_library_path: {
         if (qbs.targetOS.contains("osx"))
             return ide_app_target + ".app/Contents/PlugIns"

src/libs/libs.qbs

@@ -17,5 +17,5 @@ Project {
         "utils/process_ctrlc_stub.qbs",
         "utils/utils.qbs",
         "zeroconf/zeroconf.qbs",
-    ]
+    ].concat(project.additionalLibs)
 }

src/plugins/plugins.qbs

@@ -59,5 +59,5 @@ Project {
         "valgrind/valgrind.qbs",
         "vcsbase/vcsbase.qbs",
         "welcome/welcome.qbs"
-    ]
+    ].concat(project.additionalPlugins)
 }

src/tools/tools.qbs

@@ -8,5 +8,5 @@ Project {
         "qtpromaker/qtpromaker.qbs",
         "sdktool/sdktool.qbs",
         "valgrindfake/valgrindfake.qbs"
-    ]
+    ].concat(project.additionalTools)
 }