report line number for command errors in a script.

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

ShellPkg/Application/Shell/Shell.uni

@@ -40,6 +40,7 @@
 #string STR_SHELL_CRLF                #language en-US "\r\n"
 
 #string STR_SHELL_ERROR               #language en-US  "%NCommand Error Status: %r\r\n"
+#string STR_SHELL_ERROR_SCRIPT        #language en-US  "%NScript Error Status: %r (line number %d)\r\n"
 
 #string STR_SHELL_INVALID_MAPPING     #language en-US "%N'%B%s%N' is not a valid mapping.\r\n"
 #string STR_SHELL_INVALID_SPLIT       #language en-US "Invalid use of pipe (%B|%N).\r\n"