pmloglib-private: Use WEBOS_REPO_NAME variable

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: I508ab0878e9e1036b2bbcc5672e90269adcdaa95
Reviewed-on: https://g2g.palm.com/2534
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>