Update the en-US definition in 'UefiShellInstall1CommandsLib.uni', 'UefiShellLevel1CommandsLib.uni', 'UefiShellLevel3CommandsLib.uni' and 'UefiShellNetwork1CommandsLib.uni' to make them consistent.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Jaben Carsey <Jaben.carsey@intel.com>

git-svn-id: svn://svn.code.sf.net/p/edk2/code/trunk/edk2/ShellPkg@15740 6f19259b-4bc3-4df7-8a09-765794883524