Update Build_Nuclei.md

fanghuaqi · web-flow · commit 22fac80781a1 · 2020-10-28T10:34:44.000+08:00
diff --git a/Build_Nuclei.md b/Build_Nuclei.md
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 # Build RISC-V GNU Toolchain For Nuclei
 
+![Build Nuclei GNU Toolchain](https://github.com/riscv-mcu/riscv-gnu-toolchain/workflows/Build%20GNU%20Toolchain/badge.svg)
+
 This guide is used to provide steps for build windows and linux version of **RISC-V GNU Toolchain for Nuclei**.
 
 ## Get toolchain sources
