Allow linking against MKLML (apache#2902)

Author: ajtulloch

cmake/modules/contrib/BLAS.cmake

@@ -10,7 +10,7 @@ elseif(USE_BLAS STREQUAL "mkl")
   if(NOT IS_DIRECTORY ${USE_MKL_PATH})
     set(USE_MKL_PATH /opt/intel/mkl)
   endif()
-  find_library(BLAS_LIBRARY mkl_rt ${USE_MKL_PATH}/lib/ ${USE_MKL_PATH}/lib/intel64)
+  find_library(BLAS_LIBRARY NAMES mkl_rt mklml_gnu HINTS ${USE_MKL_PATH}/lib/ ${USE_MKL_PATH}/lib/intel64)
   include_directories(${USE_MKL_PATH}/include)
   list(APPEND TVM_RUNTIME_LINKER_LIBS ${BLAS_LIBRARY})
   list(APPEND RUNTIME_SRCS ${CBLAS_CONTRIB_SRC})