qbs build: fix usages of toolInstallDir

This amends 6706659b.

Change-Id: Ia9d6eaea92747a804bd5df130017cbf39f8bf6ad
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>

src/tools/3rdparty/iossim/iossim.qbs

 import qbs 1.0
 import QtcTool
 
-
 QtcTool {
     name: "iossim"
     condition: qbs.targetOS.contains("osx")
@@ -27,5 +26,5 @@ QtcTool {
                                  "AppKit"])
     cpp.frameworkPaths: base.concat("/System/Library/PrivateFrameworks")
 
-    toolInstallDir: project.ide_libexec_path + "/ios"
+    installDir: project.ide_libexec_path + "/ios"
 }

src/tools/iostool/iostool.qbs

@@ -20,5 +20,5 @@ QtcTool {
                                  "SystemConfiguration"])
     cpp.dynamicLibraries: base.concat(["ssl", "bz2"])
 
-    toolInstallDir: project.ide_libexec_path + "/ios"
+    installDir: project.ide_libexec_path + "/ios"
 }