update zig to 0.8.0 (#279)

zig 0.8.0 got released, so this pr updates it

packages/zig/0.8.0/build.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+mkdir -p bin
+cd bin/
+
+curl -L "https://ziglang.org/download/0.8.0/zig-linux-x86_64-0.8.0.tar.xz" -o zig.tar.xz
+tar xf zig.tar.xz --strip-components=1
+rm zig.tar.xz
+
+cd ../

packages/zig/0.8.0/compile

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+# optimizing for small programs
+rename 's/$/\.zig/' "$@" # Add .zig extension
+
+zig build-exe -O ReleaseSafe --color off --cache-dir . --global-cache-dir . --name out *.zig

packages/zig/0.8.0/environment

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+# compiler path
+export PATH=$PWD/bin:$PATH

packages/zig/0.8.0/metadata.json

@@ -0,0 +1,5 @@
+{
+    "language": "zig",
+    "version": "0.8.0",
+    "aliases": ["zig"]
+}

packages/zig/0.8.0/run

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+shift # Filename is only used in compile step, so we can take it out here
+./out "$@"

packages/zig/0.8.0/test.zig

@@ -0,0 +1,6 @@
+const std = @import("std");
+
+pub fn main() !void {
+    const stdout = std.io.getStdOut().writer();
+    try stdout.print("OK\n", .{});
+}