FindBLAS/LAPACK: Provide information about used vendor
Some vendors have additional routines in BLAS/LAPACK. For example, SunPerf
has _64
suffixes for their BLAS routine implementation with Int64 type as integer. Also, Intel MKL
provides additional routines, which have an impact on the flow.
My suggestion is to add BLAS_VENDOR_NAME
and LAPACK_VENDOR_NAME
out variables which will have the name of the used vendors.