base layer hashing algorithms, fill out md5

src/base/base_inc.c

@@ -12,6 +12,7 @@
 #include "base_arena.c"
 #include "base_math.c"
 #include "base_strings.c"
+#include "base_hash.c"
 #include "base_threads.c"
 #include "base_thread_context.c"
 #include "base_command_line.c"