[maguro] Set environment variable for custom gstomx.conf location

Change-Id: Id354a542f63486344e36c4de713950c1fbb5ac95
[maguro] Move gstomx.conf to custom location

Change-Id: Ib0d7f06c2ed707de760cd50f0ea8fb4749f708b4
Merge pull request #52 from beidl/hybris-10.1

[maguro] Fix RPM file conflicts regarding gstomx.conf