String literal change.

Change-Id: Ic1289ee3abb184b4617aa42c28e6eca812600463
diff --git a/core/main.mk b/core/main.mk
index 440e0cc..be74e38 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -75,7 +75,7 @@
 ifneq (64,$(findstring 64,$(build_arch)))
 $(warning ************************************************************)
 $(warning You are attempting to build on a 32-bit system.)
-$(warning Only 64-bit build environments are supported now.)
+$(warning Only 64-bit build environments are supported beyond froyo/2.2.)
 $(warning ************************************************************)
 $(error stop)
 endif