Move doc/Makefile.am to doc/examples/Makefile.am

Change-Id: I89ef3abe86e7ceb7b389ac1cb227ea065bfbce37
diff --git a/configure.ac b/configure.ac
index 368f1cc..99f7829 100644
--- a/configure.ac
+++ b/configure.ac
@@ -114,6 +114,7 @@
 AC_OUTPUT(
 	Makefile
 	doc/Makefile
+	doc/examples/Makefile
 	src/Makefile
 	src/gsupclient/Makefile
 	include/Makefile