Add option for architecture in Makefile

In this merge request:

• Add an option to add gcc architecture option in main Makefile (-m32, -m64, etc.)
• Use a more idiomatic way to call sub Makefiles

log/src/ana/Makefile

@@ -79,7 +79,7 @@ CC = $(CHIPMUNKCC)
 ## FreeBSD                      -m32
 ##
 
-CHIPMUNKFLAGS = -m32
+CHIPMUNKFLAGS = $(ARCH_OPT)
 
 OPTIONS = -Wall -Wextra