ktrace: let both parent and child processes write into the log file.

This makes sure all malloc/realloc/free operations are correctly logged,
although there is a summary section for each process.

As a rule of thumb, when monitoring malloc operations it is recommended
to run the program with the '--nofork' argument to avoid the fork
operation in first place.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

kmtrace/ktrace.c

@@ -816,24 +816,6 @@ kuntrace()
 	write(2, "kuntrace()\n", 11);
 }
 
-int fork()
-{
-  int result;
-  if (mallstream)
-     fflush(mallstream);
-  result = __fork();
-  if (result == 0)
-  {
-    if (mallstream)
-    {
-      close(fileno(mallstream));
-      mallstream = NULL;
-    }
-  }
-  return result;
-}
-
-
 static int my_mcount_lock = 0;
 void mcount()
 {