use git-submodule for libraries #2

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laforge wants to merge 4 commits from laforge/osmocom-analog:laforge/submodule into master

Author	SHA1	Message	Date
Harald Welte	917662e867	introduce git submodule for src/lib This means that clones now have to use 'git clone --recursive' or existing clones have to manually do 'git submodule init && git submodule update'. The advantage is that the new library submodule can be used from other projects like osmo-cc-* without code duplication.	9 months ago
Harald Welte	5c474118b1	remove src/lib from this repository, prepare for submodule The contents of src/lib will be replaced with a submodule in a following commmit	9 months ago
Harald Welte	9ed1f48b5d	re-structure directory tree in preparation of submodules This moves src/lib* to src/lib/lib* so that we can move src/lib into a submodule in a subsequent commit	9 months ago
Harald Welte	b18ac21691	src/test/Makefile.am: Fix some typos of sources .x -> .c	9 months ago