moved random procs from math to its own module (breaking change)

tests/js/tclosures.nim

@@ -2,7 +2,7 @@ discard """
   action: run
 """
 
-import math, strutils
+import math, random, strutils
 const consolePrefix = "jsCallbacks"
 
 asm """

tests/parallel/twrong_refcounts.nim

@@ -2,7 +2,7 @@ discard """
   output: "Success"
 """
 
-import math, threadPool
+import math, random, threadPool
 
 # ---
 

tests/stdlib/tmath.nim

@@ -1,4 +1,4 @@
-import math
+import math, random
 import unittest
 import sets
 

tests/stdlib/tunittest.nim

@@ -26,7 +26,7 @@ test "unittest multiple requires":
   require(true)
 
 
-import math
+import math, random
 from strutils import parseInt
 proc defectiveRobot() =
   randomize()

tests/threads/ttryrecv.nim

@@ -4,7 +4,7 @@ discard """
 
 # bug #1816
 
-from math import random
+from random import random
 from os import sleep
 
 type PComm = ptr Channel[int]