flags require for host env

mk/vars.mk

@@ -347,7 +347,9 @@ HOST_ENV=		CC='$(HOST_CC)' \
 			CPPFLAGS='$(HOST_CPPFLAGS)' \
 			CFLAGS='$(HOST_CFLAGS)' \
 			CXXFLAGS='$(HOST_CXXFLAGS)' \
-			LDFLAGS='$(HOST_LDFLAGS)'
+			LDFLAGS='$(HOST_LDFLAGS)' \
+			CC_FOR_BUILD='$(HOST_CC)' \
+			CFLAGS_FOR_BUILD='$(HOST_CFLAGS)'
 
 PKG_SUFFIX:=		$(strip $(subst ",, $(ADK_PACKAGE_SUFFIX)))