Skip all linker work when --no-link is set

Move no_link_obj check to beginning of flushModuleInner to avoid
all linking overhead including ZigObject flush and object parsing.
When using -fllvm with --no-link, LLVM handles object emission
directly so we don't need any linker operations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: Claude

src/link/Elf.zig

@@ -839,6 +839,11 @@ fn flushModuleInner(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id) !void {
     const gpa = comp.gpa;
     const diags = &comp.link_diags;
 
+    // Skip linking entirely if --no-link flag is set
+    if (comp.no_link_obj) {
+        return;
+    }
+
     const module_obj_path: ?Path = if (self.base.zcu_object_sub_path) |path| .{
         .root_dir = self.base.emit.root_dir,
         .sub_path = if (fs.path.dirname(self.base.emit.sub_path)) |dirname|
@@ -849,11 +854,6 @@ fn flushModuleInner(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id) !void {
 
     if (self.zigObjectPtr()) |zig_object| try zig_object.flush(self, tid);
 
-    // Skip linking if --no-link flag is set (after ZigObject flush, before parsing objects)
-    if (comp.no_link_obj) {
-        return;
-    }
-
     // Parse LLVM-generated object file(s)
     if (module_obj_path) |path| {
         const partition_count = self.base.zcu_object_partition_count;