rocBLAS-2.0.0 for ROCm 2.0

Changelist:

• improved performance of fp16/fp32 rocblas_gemm_ex on gfx906
• support for i8/i32 rocblas_gemm_ex
• update vega-10 resnet50 tuning
• refactor testing to be data driven
• change gemm-ex API solution index from uint32_t to int32_t
• disable gemm and gemm_ex chunking
• fix gemv argument checking
• add performance script for p1b1 benchmark sizes
• refactor gemm code to reduce use of macros
• trsm performance regression fix