kconfiglib: Clarify kconfig_filenames doc re. absolute paths

Update Kconfiglib (and menuconfig, just to sync) to upstream revision
99a7af769352b, to add the commit below, for a doc issue reported by
Sebastian Bøe:

  Document that kconfig_filenames keeps absolute paths as-is

  Came up in https://github.com/ulfalizer/Kconfiglib/issues/67.

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
2 files changed