Move examples/ to doc/examples/

Change-Id: I1e163e10f8a2e22b9ebdcb2d0f13f6ad07c84efe
diff --git a/Makefile.am b/Makefile.am
index 240e4ee..723c9ed 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,6 @@
 AUTOMAKE_OPTIONS = foreign dist-bzip2 1.6
 
-SUBDIRS = include src examples tests contrib
+SUBDIRS = include src doc tests contrib
 EXTRA_DIST = osmoappdesc.py README.md
 
 DISTCHECK_CONFIGURE_FLAGS = \