Update bug_report.md

.github/ISSUE_TEMPLATE/bug_report.md

@@ -10,12 +10,21 @@ assignees: ''
 **Describe the bug**
 A clear and concise description of what the bug is.
 
+Which part of OpenFPGA is buggy
+- [ ] Documentation
+- [ ] OpenFPGA flow
+- [ ] FPGA-Verilog
+- [ ] FPGA-Bitstream
+- [ ] FPGA-SDC
+- [ ] FPGA-SPICE
+- [ ] VPR
+- [ ] Yosys
+
 **To Reproduce**
 Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
+1. Clone OpenFPGA repository and checkout commit id: <The problem commit id>
+2. Execute OpenFPGA task or your own example: <more details>
+3. See error
 
 **Expected behavior**
 A clear and concise description of what you expected to happen.
@@ -24,9 +33,22 @@ A clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 **Enviornment (please complete the following information):**
- - OS: [e.g. CentOs, Ubuntu]
- - Compiler [e.g. gcc, clang]
- - Version [e.g. Github commit id]
+ - OS: 
+   - [ ] CentOS 7
+   - [ ] Ubuntu 18.04
+   - [ ] Others. If so, please specify:
+ - Compiler
+   - [ ] gcc-5
+   - [ ] gcc-6
+   - [ ] gcc-7
+   - [ ] gcc-8
+   - [ ] gcc-9
+   - [ ] clang-6
+   - [ ] clang-8
+   - [ ] Others. If so, please specify:
+ - Version
+   - [ ] Current master
+   - [ ] Others. If so, please specify Github commit id: 
 
 **Additional context**
 Add any other context about the problem here.