Add 'libosmocore/' from commit '045cc22baeb7f12dcb0022b79a1984d86e922870'

git-subtree-dir: libosmocore
git-subtree-mainline: e164d29e7f6c86d1f6f047bbf58159e46a11425f
git-subtree-split: 045cc22baeb7f12dcb0022b79a1984d86e922870
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

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