adds wrapper for uapi directory

SVN-Revision: 34683

include/kernel.mk

@@ -35,6 +35,7 @@ else
   endif
   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
+  LINUX_UAPI_DIR=$(firstword $(wildcard $(LINUX_DIR)/include/uapi $(LINUX_DIR)/include))
 
   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)