Add README.md

Change-Id: I02b43a10f4f88a73c7e4e63221bec32d0d1d5bf6

README.md

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+# rocminfo
+ROCm Application for Reporting System Info 
+
+## To Build
+Use the standard cmake build procedure to build rocminfo. The location of ROCM root (parent directory containing ROCM headers and libraries) must be provided as a cmake argument. For example, building from the CMakeLists.txt directory might look like this:
+
+mkdir -p build
+
+cd build
+
+cmake -DROCM_DIR=<path to ROCM root> ..
+
+make
+
+cd ..
+
+
+Upon a successful build the binary, rocminfo, will be in the build folder.
+