Move target_address_t to arch.h, rename to arch_addr_t
Note that the placement under arch.h is currently conceptual only. Since
no backend defines ARCH_HAVE_ADDRESS_TYPES, it's actually in sysdep.h in
all cases.
diff --git a/proc.h b/proc.h
index 0dfa7db..03ef044 100644
--- a/proc.h
+++ b/proc.h
@@ -99,7 +99,7 @@
/* Dictionary of breakpoints (which is a mapping
* address->breakpoint). This is NULL for non-leader
* processes. XXX note that we store addresses (keys) by
- * value. That assumes that target_address_t fits in host
+ * value. That assumes that arch_addr_t fits in host
* pointer. */
Dict * breakpoints;