GC tests now finally part of testsuite

tests/gc/gcleak3.nim

@@ -0,0 +1,27 @@
+discard """
+  outputsub: "no leak: "
+"""
+
+type
+  TSomething = object
+    s: string
+    s1: string
+var s: seq[TSomething] = @[]
+for i in 0..1024:
+  var obj: TSomething
+  obj.s = "blah"
+  obj.s1 = "asd"
+  s.add(obj)
+
+proc limit*[t](a: var seq[t]) =
+  var loop = s.len() - 512
+  for i in 0..loop:
+    #echo i
+    #GC_fullCollect()
+    if getOccupiedMem() > 3000_000: quit("still a leak!")
+    s.delete(i)
+
+s.limit()
+
+echo "no leak: ", getOccupiedMem()
+