PySOM No GC support

no-gc.patch

diff --git a/src/rlib/rgc.py b/src/rlib/rgc.py
index d5de78a..dfe48a0 100644
--- a/src/rlib/rgc.py
+++ b/src/rlib/rgc.py
@@ -5,3 +5,6 @@ except ImportError:
 
     def collect():
         pass
+
+    def disable():
+        pass
diff --git a/src/som/vm/universe.py b/src/som/vm/universe.py
index e795cab..788e755 100644
--- a/src/som/vm/universe.py
+++ b/src/som/vm/universe.py
@@ -5,6 +5,7 @@ from rlib import jit
 from rlib.string_stream import encode_to_bytes
 from rlib.exit import Exit
 from rlib.osext import path_split
+from rlib import rgc
 
 from som.vmobjects.array import Array
 from som.vmobjects.block_bc import block_evaluation_primitive
@@ -162,6 +163,8 @@ class Universe(object):
                 self._dump_bytecodes = True
             elif arguments[i] in ["-h", "--help", "-?"] and not saw_others:
                 self._print_usage_and_exit()
+            elif arguments[i] == "--no-gc" and not saw_others:
+                rgc.disable()
             else:
                 saw_others = True
                 remaining_args.append(arguments[i])
@@ -204,6 +207,8 @@ class Universe(object):
         std_println("        set search path for application classes")
         std_println("    -d  enable disassembling")
         std_println("    -h  print this help")
+        std_println("")
+        std_println("    --no-gc disable garbage collection")
 
         # Exit
         self.exit(0)