made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/lib/tcl8.6/msgs/zh_cn.msg

@@ -0,0 +1,7 @@
+# created by tools/loadICU.tcl -- do not edit
+namespace eval ::tcl::clock {
+    ::msgcat::mcset zh_CN DATE_FORMAT "%Y-%m-%e"
+    ::msgcat::mcset zh_CN TIME_FORMAT "%k:%M:%S"
+    ::msgcat::mcset zh_CN TIME_FORMAT_12 "%P%I\u65f6%M\u5206%S\u79d2"
+    ::msgcat::mcset zh_CN DATE_TIME_FORMAT "%Y-%m-%e %k:%M:%S %z"
+}