doc/manuals: integrate into this repository

Update .gitignore and make the manuals build without a toplevel
configure.ac file from autotools:

$ cd doc/manuals
$ make

Related: OS#3385
Change-Id: I5916bc7e656b508fc74917e79841ce7e1ee4981b
diff --git a/doc/manuals/Makefile b/doc/manuals/Makefile
new file mode 100644
index 0000000..0730411
--- /dev/null
+++ b/doc/manuals/Makefile
@@ -0,0 +1,8 @@
+OSMO_GSM_MANUALS_DIR := $(shell ./osmo-gsm-manuals-dir.sh)
+srcdir=$(CURDIR)
+
+ASCIIDOC = osmo-gsm-tester-manual.adoc
+ASCIIDOC_DEPS = $(srcdir)/chapters/*.adoc
+include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.asciidoc.inc
+
+include $(OSMO_GSM_MANUALS_DIR)/build/Makefile.common.inc