CMake Nightly Date Stamp
OS X: If necessary, use xcrun to help find otool used to query install names.

This fixes querying for @rpath install names when using Xcode without
the command line tools installed.
Merge topic 'rpath-on-mac' into next

84698ab OS X: If necessary, use xcrun to help find otool used to query install names.
46558d2 CMake Nightly Date Stamp