std.zig.target: support aarch64-maccatalyst and x86_64-maccatalyst cross libc

Author: alexrp

lib/std/zig/target.zig

@@ -34,6 +34,7 @@ pub const available_libcs = [_]ArchOsAbi{
     .{ .arch = .aarch64, .os = .freebsd, .abi = .none, .os_ver = .{ .major = 11, .minor = 0, .patch = 0 } },
     .{ .arch = .aarch64, .os = .linux, .abi = .gnu, .os_ver = .{ .major = 3, .minor = 7, .patch = 0 }, .glibc_min = .{ .major = 2, .minor = 17, .patch = 0 } },
     .{ .arch = .aarch64, .os = .linux, .abi = .musl, .os_ver = .{ .major = 3, .minor = 7, .patch = 0 } },
+    .{ .arch = .aarch64, .os = .maccatalyst, .abi = .none, .os_ver = .{ .major = 11, .minor = 0, .patch = 0 } },
     .{ .arch = .aarch64, .os = .macos, .abi = .none, .os_ver = .{ .major = 11, .minor = 0, .patch = 0 } },
     .{ .arch = .aarch64, .os = .netbsd, .abi = .none, .os_ver = .{ .major = 9, .minor = 0, .patch = 0 } },
     .{ .arch = .aarch64, .os = .windows, .abi = .gnu },
@@ -105,6 +106,7 @@ pub const available_libcs = [_]ArchOsAbi{
     .{ .arch = .x86_64, .os = .linux, .abi = .gnux32, .os_ver = .{ .major = 3, .minor = 4, .patch = 0 }, .glibc_triple = "x86_64-linux-gnu-x32" },
     .{ .arch = .x86_64, .os = .linux, .abi = .musl, .os_ver = .{ .major = 2, .minor = 6, .patch = 4 } },
     .{ .arch = .x86_64, .os = .linux, .abi = .muslx32, .os_ver = .{ .major = 3, .minor = 4, .patch = 0 } },
+    .{ .arch = .x86_64, .os = .maccatalyst, .abi = .none, .os_ver = .{ .major = 10, .minor = 15, .patch = 0 } },
     .{ .arch = .x86_64, .os = .macos, .abi = .none, .os_ver = .{ .major = 10, .minor = 7, .patch = 0 } },
     .{ .arch = .x86_64, .os = .netbsd, .abi = .none, .os_ver = .{ .major = 2, .minor = 0, .patch = 0 } },
     .{ .arch = .x86_64, .os = .windows, .abi = .gnu },