Add xilinx readme.

.vscode/settings.json

@@ -1,7 +0,0 @@
-{
-  "files.associations": {
-    "BUILD": "bazel",
-    "memory": "cpp",
-    "stdarg.h": "c"
-  }
-}

xilinx/Readme.md

@@ -0,0 +1,11 @@
+# Vivado
+
+## install depends
+
+```bash
+sudo apt install libncurses5
+```
+
+## install driver
+
+`sudo <Vivado Install Dir>/data/xicom/cable_drivers/lin64/install_script/install_drivers/install_drivers`