Add support for running Kustomize on Linux ARM64 (#176)

Add support for kustomize to run on Linux ARM64

Author: ysinjab

skylib/kustomize/kustomize.bzl

@@ -18,11 +18,16 @@ load("//skylib:stamp.bzl", "stamp")
 _binaries = {
     "darwin_amd64": ("https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv4.5.3/kustomize_v4.5.3_darwin_amd64.tar.gz", "b0a6b0568273d466abd7cd535c556e44aa9ff5f54c07e86ed9f3016b416de992"),
     "linux_amd64": ("https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv4.5.3/kustomize_v4.5.3_linux_amd64.tar.gz", "e4dc2f795235b03a2e6b12c3863c44abe81338c5c0054b29baf27dcc734ae693"),
+    "linux_arm64": ("https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv4.5.3/kustomize_v4.5.3_linux_arm64.tar.gz", "97cf7d53214388b1ff2177a56404445f02d8afacb9421339c878c5ac2c8bc2c8"),
 }
 
 def _download_binary_impl(ctx):
     if ctx.os.name == "linux":
-        platform = "linux_amd64"
+        current_architecture = ctx.execute(["uname", "-m"]).stdout.strip()
+        if current_architecture == "aarch64":
+            platform = "linux_arm64"
+        else:
+            platform = "linux_amd64"
     elif ctx.os.name == "mac os x":
         platform = "darwin_amd64"
     else: