Merge pull request #21478 from albers/ignore-bashrc

re-add .bashrc to .gitignore

.gitignore

@@ -7,6 +7,8 @@
 *.test
 .*.swp
 .DS_Store
+# a .bashrc may be added to customize the build environment
+.bashrc
 .gopath/
 autogen/
 bundles/