* Positive U.S. GDP data boosts rate hike views * Gold heading for fifth straight monthly loss * Palladium down from 7-wk high hit on Wednesday * GRAPHIC-2018 asset returns: tmsnrt.rs/2jvdmXl (Recasts, adds comment, updates prices) By Sethuraman N R BENGALURU, Aug 30 (Reuters) – Gold prices inched lower […]