ShellPkg: Add a new library for "bcfg" command

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Chris Phillips <chrisp@hp.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
Reviewed by: Tapan Shah <tapandshah@hp.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/ShellPkg@16092 6f19259b-4bc3-4df7-8a09-765794883524
ShellPkg: Use the new library for "bcfg" command

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Chris Phillips <chrisp@hp.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
Reviewed by: Tapan Shah <tapandshah@hp.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/ShellPkg@16093 6f19259b-4bc3-4df7-8a09-765794883524