solving install issue on readon compute platform - 1.7 tested

[Curious9x]

Please include following in instructions for users trying 1.7 rocm platform:

Sys.setenv(OPENCL_LIB="/opt/rocm/opencl/lib/x86_64",OPENCL_INC="/opt/rocm/opencl/include/")

I struggled, but got it working, finally. I hope it helps.

System details are as:
`-----
sessionInfo()
R version 3.4.3 (2017-11-30)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 16.04.3 LTS

Matrix products: default
BLAS: /usr/lib/libblas/libblas.so.3.6.0
LAPACK: /usr/lib/lapack/liblapack.so.3.6.0

locale
[1] LC_CTYPE=en_CA.UTF-8 LC_NUMERIC=C LC_TIME=en_CA.UTF-8
[4] LC_COLLATE=en_CA.UTF-8 LC_MONETARY=en_CA.UTF-8 LC_MESSAGES=en_CA.UTF-8
[7] LC_PAPER=en_CA.UTF-8 LC_NAME=C LC_ADDRESS=C
[10] LC_TELEPHONE=C LC_MEASUREMENT=en_CA.UTF-8 LC_IDENTIFICATION=C
---------------`

[cdeterman]

Thank you for the contribution! I will be sure to add it to the documentation.

[cdeterman]

@Curious9x I have added this to the wiki. Thanks for your report.