The AC_EGREP_CPP macro is looking for a 'yes' string that is likely
to be found in the path where the file is stored. This false positive
match causes variables to be mistakenly set.
The fix is to use a more elaborated string instead.
This has to be done at the configure and the configure.ac files, because
a reconfigure does not happen in the regular build flow.
[YOCTO #6614]
Signed-off-by: Benjamin Esquivel <benjamin.esquivel@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
