Add a temporary typealias to avoid build breakage

Author: parkera

stdlib/public/core/CommandLine.swift

@@ -12,6 +12,9 @@
 
 import SwiftShims
 
+/// Temporary typealias to aid in migration
+public typealias Process = CommandLine
+
 /// Command-line arguments for the current process.
 public enum CommandLine {
   /// The backing static variable for argument count may come either from the