Add logic to check the execution break flag before executing the next command in a script file.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Jaben carsey <Jaben.carsey@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13547 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/Shell.c

@@ -1874,6 +1874,9 @@ RunScriptFileHandle (
           Status = EFI_SUCCESS;
           break;
         }
+        if (ShellGetExecutionBreakFlag()) {
+          break;
+        }
         if (EFI_ERROR(Status)) {
           break;
         }