Fix installation of includes.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6317 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index 74af7a8..f625a9e 100644
--- a/configure.in
+++ b/configure.in
@@ -891,6 +891,7 @@
    perf/Makefile 
    perf/vg_perf
    include/Makefile 
+   include/vki/Makefile 
    auxprogs/Makefile
    coregrind/Makefile 
    memcheck/Makefile