github: update issue template

.github/issue_template.md

@@ -1,25 +1,27 @@
 Here's the place for your question, suggestion, a feature request or brief
 description of the problem. If you are submitting a defect report please fill
-the sections below. For everything else feel free to remove everything below
-the line.
+all the sections below. For everything else feel free to remove everything
+below the line.
 
 -----------------------------------------------------------------------------
 
 ### Environment
-Intel MKL-DNN includes hardware-specific optimizations and may behave 
-differently on depending on the compiler and build environment. Include 
+Intel MKL-DNN includes hardware-specific optimizations and may behave
+differently on depending on the compiler and build environment. Include
 the following information to help reproduce the issue:
-* CPU make and model (try `lscpu`)
+* CPU make and model (try `lscpu`; if your `lscpu` does not list CPU flags,
+  try running `cat /proc/cpuinfo | grep flags | sort -u`)
 * OS version (`uname -a`)
 * Compiler version (`gcc --version`)
 * MKLROOT value (`echo MKLROOT=$MKLROOT`)
 * CMake version (`cmake --version`)
 * CMake output log
+* git hash (`git log -1 --format=%H`)
 
 ### Steps to reproduce
-Please check that the issue is reproducible with the latest revision on 
-master. Include the steps to reproduce the issue. A short C/C++ program
-or modified unit tests demonstrating the issue will greatly help 
+Please check that the issue is reproducible with the latest revision on
+master. Include all the steps to reproduce the issue. A short C/C++ program
+or modified unit tests demonstrating the issue will greatly help
 with the investigation.
 
 ### Actual behavior