move mzscheme' and mzlib/unit200' from core to "compatibility-lib"

Also, move `mzlib/sandbox' to "compatibility-lib".

pkgs/compatibility-pkgs/compatibility-lib/info.rkt

@@ -1,3 +1,5 @@
 #lang info
 (define collection 'multi)
-(define deps '("base" "net-lib"))
+(define deps '("base" 
+               "net-lib"
+               "sandbox-lib"))

pkgs/errortrace-pkgs/errortrace-lib/errortrace/zo-compile.rkt

@@ -1,4 +1,4 @@
-(module zo-compile mzscheme
+(module zo-compile racket/base
   (require "errortrace-lib.rkt")
   
   (provide zo-compile)

pkgs/gui-pkgs/gui-test/info.rkt

@@ -6,5 +6,6 @@
                "gui-lib"
                "rackunit-lib"
                "scribble-lib"
-               "pconvert-lib"))
+               "pconvert-lib"
+               "compatibility-lib"))
 (define build-deps '())

pkgs/lazy/info.rkt

@@ -22,5 +22,6 @@
 (define deps '("base"
                "drracket"
                "htdp"
-               "string-constants-lib"))
+               "string-constants-lib"
+               "compatibility-lib"))
 (define build-deps '("scribble-lib"))

pkgs/srfi-pkgs/srfi-doc/info.rkt

@@ -7,4 +7,5 @@
                      "srfi-lib"
                      "racket-doc"
                      "r5rs-doc"
-                     "r6rs-doc"))
+                     "r6rs-doc"
+                     "compatibility-lib"))