add license to package info.rkt files

related to racket/racket#3760

Author: LiberalArtist

drracket-plugin-lib/info.rkt

@@ -9,3 +9,6 @@
 (define pkg-desc "DrRacket's plugin API")
 
 (define pkg-authors '(robby))
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket-test/info.rkt

@@ -20,3 +20,6 @@
 (define pkg-desc "tests for \"drracket\"")
 
 (define pkg-authors '(robby))
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket-tool-doc/info.rkt

@@ -10,3 +10,6 @@
 (define pkg-authors '(robby))
 
 (define version "1.2")
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket-tool-lib/info.rkt

@@ -16,3 +16,6 @@
 (define pkg-authors '(robby))
 
 (define version "1.1")
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket-tool-test/info.rkt

@@ -12,3 +12,6 @@
 (define pkg-authors '(robby))
 
 (define version "1.0")
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket-tool/info.rkt

@@ -10,3 +10,6 @@
 (define pkg-desc "Programmatic interface to some IDE tools that DrRacket supports")
 
 (define pkg-authors '(robby))
+
+(define license
+  '(Apache-2.0 OR MIT))

drracket/info.rkt

@@ -67,3 +67,6 @@
 (define pkg-authors '(robby))
 
 (define version "1.12")
+
+(define license
+  '(Apache-2.0 OR MIT))