Define __STDC_CONSTANT_MACROS globally to work around host build differences.

Change-Id: I945128b3087b28f62467c7123b759e3514027574
diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index a0aaafa..037dee6 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -36,7 +36,7 @@
 
 # Workaround differences in inttypes.h between host and target.
 # See bug 12708004.
-HOST_GLOBAL_CFLAGS += -D__STDC_FORMAT_MACROS
+HOST_GLOBAL_CFLAGS += -D__STDC_FORMAT_MACROS -D__STDC_CONSTANT_MACROS
 
 build_mac_version := $(shell sw_vers -productVersion)