add doc/examples, Makefile.am adds all *.cfg files generically

doc/examples/Makefile.am taken from openbsc/openbsc/doc/examples.

Change-Id: I1fadad4deb7f73d2b3aa753a84a76ba5b9bf9574
diff --git a/doc/examples/Makefile.am b/doc/examples/Makefile.am
new file mode 100644
index 0000000..8f14fdc
--- /dev/null
+++ b/doc/examples/Makefile.am
@@ -0,0 +1,23 @@
+
+CFG_FILES = find $(srcdir) -name '*.cfg*' | sed -e 's,^$(srcdir),,'
+
+dist-hook:
+	for f in $$($(CFG_FILES)); do \
+		j="$(distdir)/$$f" && \
+		mkdir -p "$$(dirname $$j)" && \
+		$(INSTALL_DATA) $(srcdir)/$$f $$j; \
+	done
+
+install-data-hook:
+	for f in $$($(CFG_FILES)); do \
+		j="$(DESTDIR)$(docdir)/examples/$$f" && \
+		mkdir -p "$$(dirname $$j)" && \
+		$(INSTALL_DATA) $(srcdir)/$$f $$j; \
+	done
+
+uninstall-hook:
+	@$(PRE_UNINSTALL)
+	for f in $$($(CFG_FILES)); do \
+		j="$(DESTDIR)$(docdir)/examples/$$f" && \
+		$(RM) $$j; \
+	done