added one more level of redirection for building the StorageVolume.h file. This...

added one more level of redirection for building the StorageVolume.h file.  This is done in preperation to support dynamic threads that need to ahve this file built, but bypass the normal 'exe' target built for a platform.  Also remove, via the 'clean' target, a VolumeMapC.nc file that is now generated when linking the sorage abstractions used by dynamic threads to the <storage-chip>.xml file in the application directory