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

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

@@ -0,0 +1,7 @@
+# created by tools/loadICU.tcl -- do not edit
+namespace eval ::tcl::clock {
+    ::msgcat::mcset pt_BR DATE_FORMAT "%d-%m-%Y"
+    ::msgcat::mcset pt_BR TIME_FORMAT "%T"
+    ::msgcat::mcset pt_BR TIME_FORMAT_12 "%T"
+    ::msgcat::mcset pt_BR DATE_TIME_FORMAT "%a %d %b %Y %T %z"
+}