Create build.rst

Create the build file

[ROCm/rocminfo commit: 51dc160fc6]

projects/rocminfo/docs/install/build.rst

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+
+
+Build ROCmInfo
+*****************
+
+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 using the standard CMAKE_PREFIX_PATH cmake variable.
+
+After cloning the rocminfo git repo, please make sure to do a git-fetch --tags to get the tags residing on the repo. These tags are used for versioning.
+
+For example,
+
+.. code-block::
+
+    $ git fetch --tags origin
+    
+    Building from the CMakeLists.txt directory might look like this:
+    
+    mkdir -p build
+    
+    cd build
+    
+    cmake -DCMAKE_PREFIX_PATH=/opt/rocm ..
+    
+    make
+    
+    cd ..
+
+Upon a successful build, the binary, rocminfo, and the python script, rocm_agent_enumerator, will be in the `build` folder.