Misc small cleanups.

libc/stdlib/malloc/free.c

@@ -106,7 +106,8 @@ unmap_free_area (struct heap *heap, struct heap_free_area *fa)
 }
 
 
-void free (void *mem)
+void
+free (void *mem)
 {
   if (mem)
     {

libc/stdlib/malloc/malloc.c

@@ -23,7 +23,8 @@
 struct heap __malloc_heap = HEAP_INIT;
 
 
-void *malloc (size_t size)
+void *
+malloc (size_t size)
 {
   void *mem;
 

libc/stdlib/malloc/realloc.c

@@ -13,13 +13,13 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <sys/mman.h>
 
 #include "malloc.h"
 #include "heap.h"
 
 
-void *realloc (void *mem, size_t new_size)
+void *
+realloc (void *mem, size_t new_size)
 {
   if (! mem)
     return malloc (new_size);