Support CONFIG_ANALYZER in the cmake build.

- Use the FindwxWidgets (the cmake module) to detect library
  flags and handle include paths.
- Update target to link in the libs located by FindwxWidgets.
- Enable CONFIG_INSPECTION and warn at generation time when it's
  not present and CONFIG_ANALYZER is enabled.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: Ica949107d199af9d8241ca639cc27753d4a30dfc
2 files changed