Chose correct debug file with variant builds

In builds where variants are used anywhere (e.g. for fuzzers) normal
output executables will be placed in a x64-novariant directory in the
build output. We can parse the binaries.json file to figure out the
location of the debug file for codec_runner_intel_gen, rather than
hardcoding it.

Change-Id: Ibfa43a9a4cb5b016fffbb56e824a3656e61a2307
1 file changed