trace: move BeesTrace and BeesNote into their own translation unit

This allows these components to be used by test executables without
pulling in all of bees, and more rapidly iterate their code.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

src/Makefile

@@ -20,6 +20,7 @@ BEES_OBJS = \
 	bees-resolve.o \
 	bees-roots.o \
 	bees-thread.o \
+	bees-trace.o \
 	bees-types.o \
 
 ALL_OBJS = $(BEES_OBJS) $(PROGRAM_OBJS)