doc: Add powerpc64 as tier 1

lu-zero · lu-zero · commit 6f09280ef218 · 2017-06-20T00:02:12.000+02:00
diff --git a/README.md b/README.md
@@ -51,6 +51,8 @@ Tier 1:
   * i686-apple-darwin
   * x86_64-apple-darwin
   * aarch64-unknown-linux-gnu
+  * powerpc64-unknown-linux-gnu
+  * powerpc64le-unknown-linux-gnu
   * armv7-unknown-linux-gnueabihf
   * arm-unknown-linux-gnueabi
   * x86_64-unknown-freebsd
