feat: support s390x and powerpc (#289)

This patch adds support for `s390x` and `powerpc`.

According
https://github.com/nodejs/node/blob/main/BUILDING.md#platform-list ,
only `powerpcle` available on Linux. So we always use
`uv-powerpc64le-unknown-linux-gnu`

dist/setup/index.js

@@ -95648,6 +95648,8 @@ function getArch() {
         ia32: "i686",
         x64: "x86_64",
         arm64: "aarch64",
+        s390x: "s390x",
+        ppc64: "powerpc64le",
     };
     if (arch in archMapping) {
         return archMapping[arch];