Replace the sqlite allocator, and use our own tracking for stats. Want to use this to collect callstacks for all allocations.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4185 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/mem.h

@@ -10,6 +10,9 @@ size_t tf_mem_get_uv_malloc_size();
 void tf_mem_replace_tls_allocator();
 size_t tf_mem_get_tls_malloc_size();
 
+void tf_mem_replace_sqlite_allocator();
+size_t tf_mem_get_sqlite_malloc_size();
+
 size_t tf_mem_get_tf_malloc_size();
 
 void* tf_malloc(size_t size);