Install nawak one subdirectory down, not two

toolset/setup/linux/frameworks/nawak.sh

@@ -3,6 +3,6 @@
 RETCODE=$(fw_exists nawak)
 [ ! "$RETCODE" == 0 ] || { return 0; }
 
-git clone git://github.com/idlewan/nawak.git nawak/nawak
-cd nawak/nawak
+git clone git://github.com/idlewan/nawak.git nawak
+cd nawak
 git checkout 5e56d718ff327c58cbdca14d44abc327f752681d