no big endian (#7974)

src/bundler/bundle_v2.zig

@@ -11280,7 +11280,6 @@ const ContentHasher = struct {
     }
 
     pub fn writeInts(self: *ContentHasher, i: []const u32) void {
-        // TODO: BigEndian
         self.hasher.update(std.mem.sliceAsBytes(i));
     }
 

src/main.zig

@@ -1,4 +1,5 @@
 const std = @import("std");
+const builtin = @import("builtin");
 pub const build_options = @import("build_options");
 
 const panicky = @import("./panic_handler.zig");
@@ -6,6 +7,10 @@ const MainPanicHandler = panicky.NewPanicHandler(std.builtin.default_panic);
 
 pub const io_mode = .blocking;
 
+comptime {
+    std.debug.assert(builtin.target.cpu.arch.endian() == .little);
+}
+
 pub fn panic(msg: []const u8, error_return_trace: ?*std.builtin.StackTrace, addr: ?usize) noreturn {
     MainPanicHandler.handle_panic(msg, error_return_trace, addr);
 }