docs: Document how to use fio with hipfile

Author: kurtmcmillan

docs/fio.rst

@@ -0,0 +1,25 @@
+fio
+===
+
+A hipfile engine has been added to the ROCm fork of fio:
+https://github.com/ROCm/fio/tree/hipFile
+
+To build fio with hipfile support use the following: ::
+
+    $ cd ~
+    $ git clone git@github.com:ROCm/hipFile.git
+    $ mkdir hipFile/build; cd hipFile/build
+    $ cmake .. && cmake --build . -j
+    
+    $ cd ~
+    $ git clone git@github.com:ROCm/fio.git
+    $ cd fio && git checkout origin/hipFile
+    $ HIPFILE=$HOME/hipFile \
+            CFLAGS="-I/opt/rocm/include -I$HIPFILE/include" \
+            LDFLAGS="-L/opt/rocm/lib -L$HIPFILE/build/src/amd_detail -Wl,-rpath,$HIPFILE/build/src/amd_detail" \
+            ./configure --enable-libhipfile
+    $ make -j
+
+Use the example workload file from the fio repository: ::
+
+    $ GPU_DEV_IDS=0 FIO_DIR=PATH_TO_EXT_OR_XFS_DIRECTORY ~/fio/fio ~/fio/examples/libhipfile-hipfile.fio