[gnome-builder] rustup: update rustup script from rustup.rs

[Christian Hergert <chergert src gnome org>]

commit 6b4ae7968b2ebf36fdf0a1fbf9271789f7e2510b
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jul 23 02:05:49 2017 -0700

    rustup: update rustup script from rustup.rs

 plugins/rustup/rustup_plugin/resources/rustup.sh |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/plugins/rustup/rustup_plugin/resources/rustup.sh 
b/plugins/rustup/rustup_plugin/resources/rustup.sh
index 2c46f38..4156f37 100755
--- a/plugins/rustup/rustup_plugin/resources/rustup.sh
+++ b/plugins/rustup/rustup_plugin/resources/rustup.sh
@@ -230,23 +230,23 @@ get_architecture() {
 
         xscale | arm)
             local _cputype=arm
-            if [ "$_ostype" == "linux-android" ]; then
+            if [ "$_ostype" = "linux-android" ]; then
                 local _ostype=linux-androideabi
             fi
             ;;
 
         armv6l)
             local _cputype=arm
-            if [ "$_ostype" == "linux-android" ]; then
+            if [ "$_ostype" = "linux-android" ]; then
                 local _ostype=linux-androideabi
             else
                 local _ostype="${_ostype}eabihf"
             fi
             ;;
 
-        armv7l)
+        armv7l | armv8l)
             local _cputype=armv7
-            if [ "$_ostype" == "linux-android" ]; then
+            if [ "$_ostype" = "linux-android" ]; then
                 local _ostype=linux-androideabi
             else
                 local _ostype="${_ostype}eabihf"