libnl: Check data length in nla_reserve / nla_put

Ensure predictable behavior when negative values are passed
to these methods.

Bug: 32255299
Change-Id: I14d2e4a65e5b208554821f9d3ed4e3244464dfd6
Test: Recompile (integration tests will also run)
(cherry picked from commit f01b03b81ab86d2b4c0f874a438ff672d9fcc191)