Include new file (why-no-libc.txt) in the distro tarball.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8831 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/docs/internals/Makefile.am b/docs/internals/Makefile.am
index 691d229..716e6f1 100644
--- a/docs/internals/Makefile.am
+++ b/docs/internals/Makefile.am
@@ -14,4 +14,5 @@
 	release-HOWTO.txt roadmap.txt \
 	segments-seginfos.txt threads-syscalls-signals.txt \
 	tm-mutexstates.dot tm-threadstates.dot tracking-fn-entry-exit.txt \
+	why-no-libc.txt \
 	xml-output.txt