Kbuild: Export ashmem header file to user space

CRs-fixed: 291124
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 32d814b..ac3e990 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -46,6 +46,7 @@
 header-y += aio_abi.h
 header-y += apm_bios.h
 header-y += arcfb.h
+header-y += ashmem.h
 header-y += atalk.h
 header-y += atm.h
 header-y += atm_eni.h