Revert "Implement webos_build_gtest()"

This reverts commit dd42377802662d98e1e9b59103f67e49d4674d28.

Open-webOS-DCO-1.0-Signed-off-by: Herb Kuta <herb.kuta@palm.com>
Change-Id: Id3566bdeed302c402762270a786e946f32d9d285
Reviewed-on: https://g2g.palm.com/3111
Reviewed-by: Herb Kuta <herb.kuta@lge.com>
Tested-by: Herb Kuta <herb.kuta@lge.com>