clang: add Zig equivalent for -headerpad_max_install_names cli flag

src/clang_options_data.zig

@@ -4978,7 +4978,14 @@ joinpd1("fdiagnostics-show-category="),
 joinpd1("fdiagnostics-show-location="),
 joinpd1("fopenmp-cuda-blocks-per-sm="),
 jspd1("fxray-instruction-threshold"),
-joinpd1("headerpad_max_install_names"),
+.{
+    .name = "headerpad_max_install_names",
+    .syntax = .joined,
+    .zig_equivalent = .headerpad_max_install_names,
+    .pd1 = true,
+    .pd2 = false,
+    .psl = false,
+},
 .{
     .name = "libomptarget-nvptx-bc-path=",
     .syntax = .joined,

src/main.zig

@@ -1627,6 +1627,7 @@ fn buildOutputType(
                     },
                     .weak_library => try system_libs.put(it.only_arg, .{ .weak = true }),
                     .weak_framework => try frameworks.put(gpa, it.only_arg, .{ .weak = true }),
+                    .headerpad_max_install_names => headerpad_max_install_names = true,
                 }
             }
             // Parse linker args.
@@ -4581,6 +4582,7 @@ pub const ClangArgIterator = struct {
         entry,
         weak_library,
         weak_framework,
+        headerpad_max_install_names,
     };
 
     const Args = struct {

tools/update_clang_options.zig

@@ -444,6 +444,10 @@ const known_options = [_]KnownOpt{
         .name = "weak_framework",
         .ident = "weak_framework",
     },
+    .{
+        .name = "headerpad_max_install_names",
+        .ident = "headerpad_max_install_names",
+    },
 };
 
 const blacklisted_options = [_][]const u8{};