tree b4c6480b552441536cc7fa4b29b486e79fe0bee7
parent 7c4e8a454e7254bc5647a0a0f955dc2b6b10e1c5
author Alex Stewart <alexs.mac@gmail.com> 1522775263 +0100
committer Alex Stewart <alexs.mac@gmail.com> 1522775263 +0100

Fix exported gflags include path.

- In practice, this was not causing any errors, as
  GFLAGS_INCLUDE_DIR_HINTS is set from GFLAGS_INCLUDE_DIRS so the two
  would have been equivalent, but we should nonetheless be using the
  one set after the find_package() call.
- Note that this would only have been active for older gflags versions
  that were not built with CMake.

Change-Id: Ie54145f522c974b7685052aafb1d2f6055d22337