Add cpu configs to support iOS simulator builds on M1-based macs.

PiperOrigin-RevId: 423903479
diff --git a/build_defs.bzl b/build_defs.bzl
index 46f24e4..44abd13 100644
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -169,6 +169,7 @@
             ":ios_armv7": aarch32_srcs,
             ":ios_arm64": aarch64_srcs,
             ":ios_arm64e": aarch64_srcs,
+            ":ios_sim_arm64": aarch64_srcs,
             ":ios_x86": x86_srcs,
             ":ios_x86_64": x86_srcs,
             ":watchos_armv7k": aarch32_srcs,
@@ -205,6 +206,7 @@
             ":ios_armv7": apple_aarch32_copts,
             ":ios_arm64": aarch64_copts,
             ":ios_arm64e": aarch64_copts,
+            ":ios_sim_arm64": aarch64_copts,
             ":ios_x86": gcc_x86_copts,
             ":ios_x86_64": gcc_x86_copts,
             ":watchos_armv7k": apple_aarch32_copts,
@@ -298,6 +300,7 @@
             ":ios_armv7": aarch32_ios_deps,
             ":ios_arm64": aarch64_deps,
             ":ios_arm64e": aarch64_deps,
+            ":ios_sim_arm64": aarch64_deps,
             ":ios_x86": x86_deps,
             ":ios_x86_64": x86_deps,
             ":watchos_armv7k": aarch32_ios_deps,