include/lapi: Add vmsplice.h

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/configure.ac b/configure.ac
index 787d8d4..804a924 100644
--- a/configure.ac
+++ b/configure.ac
@@ -184,4 +184,5 @@
 LTP_CHECK_TIRPC
 LTP_CHECK_TEE
 LTP_CHECK_SPLICE
+LTP_CHECK_VMSPLICE
 AC_OUTPUT