Add link regarding Xtensa pushed to LLVM

Author: mscherer

faq.md

@@ -190,7 +190,7 @@ can't give you any estimate on when that might happen.
 
 # (When) will Rust support the Xtensa architecture?
 
-As of 2018-09-19 the official Rust compiler, `rustc`, relies on LLVM for
+As of 2020-08-24 the official Rust compiler, `rustc`, relies on LLVM for
 generating machine code. It's a requirement that LLVM supports an architecture
 for `rustc` to support it.
 
@@ -202,7 +202,10 @@ versions of LLVM.
 
 TL;DR `rustc` will support the Xtensa architecture when the official LLVM gains
 support for the Xtensa architecture. As LLVM is a project independent of the
-Rust project we can't give you any estimate on when that might happen.
+Rust project we can't give you any estimate on when that might happen. A list of 
+submitted patchs can be found on this [LLVM dashboard][llvm-xtensa-tracker].
+
+[llvm-xtensa-tracker]: https://reviews.llvm.org/W486
 
 # My embedded Rust program is too big!