Config.mk: Non-debug build by default.

Set debug ?= n, in preperation for late RCs and eventual release.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>

Config.mk

@@ -17,7 +17,7 @@ or       = $(if $(strip $(1)),$(1),$(if $(strip $(2)),$(2),$(if $(strip $(3)),$(
 -include $(XEN_ROOT)/.config
 
 # A debug build of Xen and tools?
-debug ?= y
+debug ?= n
 debug_symbols ?= $(debug)
 
 # Test coverage support