Builds Drosera and a launcher to include with the nightly.

        * BuildSlaveSupport/build-launcher-app:
        * BuildSlaveSupport/build-launcher-dmg:
        * Drosera/Drosera.xcodeproj/project.pbxproj:
        * Drosera/Info.plist:
        * Drosera/LauncherInfo.plist: Added.
        * Drosera/launcher.m: Added.
        (displayErrorAndQuit):
        (checkMacOSXVersion):
        (myExecve):
        (main):
        * Scripts/build-drosera
        * WebKitLauncher/WebKitLauncher.xcodeproj/project.pbxproj:
        * WebKitLauncher/main.m:
        (main):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14940 268f45cc-cd09-0410-ab3c-d52691b4dbfc