binfmt: Call umm_initialize() for BUILD_KERNEL & ADDRENV

Summary:
- I noticed that the user heap is not initialized correctly
  if BUILD_KERNEL=y and ADDRENV=y
- This commit fixes this issue

Impact:
- None

Testing:
- Tested with sabre-6quad:netknsh (not merged yet)

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

binfmt/binfmt_execmodule.c

@@ -160,6 +160,9 @@ int exec_module(FAR const struct binary_s *binp,
       binfmt_freeargv(argv);
       goto errout_with_tcb;
     }
+
+  binfo("Initialize the user heap (heapsize=%d)\n", binp->addrenv.heapsize);
+  umm_initialize((FAR void *)CONFIG_ARCH_HEAP_VBASE, binp->addrenv.heapsize);
 #endif
 
   /* Note that tcb->flags are not modified.  0=normal task */