.qbs/Mac: build tools without app bundle and install to right location

Change-Id: I422835b2e85600846aec4d309249059acf1fa483
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/tools/QtcTool.qbs

@@ -2,6 +2,7 @@ import qbs.base 1.0
 import "../../qbs/defaults.js" as Defaults
 
 Application {
+    type: "application" // no Mac app bundle
     Depends { name: "cpp" }
     cpp.defines: Defaults.defines(qbs)
     cpp.linkerFlags: {
@@ -12,6 +13,6 @@ Application {
     Group {
         fileTagsFilter: product.type
         qbs.install: true
-        qbs.installDir: project.ide_app_path
+        qbs.installDir: project.ide_libexec_path
     }
 }