Added Opensuse Tumbleweed (bevyengine#2375)

# Objective

- Describe the objective or issue this PR addresses.
- added openSUSE Tumbleweed deps that i needed to install today 2021-06-22

## Solution

- Describe the solution used to achieve the objective above.
- added info to doc

docs/linux_dependencies.md

@@ -103,3 +103,9 @@ mkShell {
 And enter it by just running `nix-shell`.
 
 You should be able compile bevy programms using `cargo` within this nix-shell.
+
+## Opensuse Tumbleweed
+
+```bash
+   sudo zypper install libudev-devel gcc-c++
+```