1. Fix several comments in function headers for 'ShellProtocol.c', 'ShellProtocol.h' and 'Ls.c'.  2. Remove the initialization of variable 'CalleeExitStatus' in function 'RunScriptFileHandle' of 'Shell.c' from its declarartion.

Signed-off-by: Shumin Qiu <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@15190 6f19259b-4bc3-4df7-8a09-765794883524
Add initializing code for local variable 'CalleeExitStatus' and 'ExitStatus' in 'Shell.c'.

Signed-off-by: Shumin Qiu <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@15191 6f19259b-4bc3-4df7-8a09-765794883524