Just cp compiler-rt Files If lipo Fails

This workaround to remove legacy architectures from the .a's can fail.
When that happens, it usually means i386 was not among any of the slices
to begin with, so just copy the library out to its destination.

Author: CodaFi

utils/build-script-impl

@@ -1416,7 +1416,7 @@ function copy_embedded_compiler_rt_builtins_from_darwin_host_toolchain() {
                 if [[ ! -f "${DEST_LIB_PATH}" ]]; then
                     if [[ -f "${HOST_LIB_PATH}" ]]; then
                         if [[ "$OS" == "tvos" ]]; then
-                           call lipo -remove i386 "${HOST_LIB_PATH}" -output "${DEST_LIB_PATH}"
+                           call lipo -remove i386 "${HOST_LIB_PATH}" -output "${DEST_LIB_PATH}" || call cp "${HOST_LIB_PATH}" "${DEST_LIB_PATH}"
                         else
                            call cp "${HOST_LIB_PATH}" "${DEST_LIB_PATH}"
                         fi
@@ -1432,7 +1432,7 @@ function copy_embedded_compiler_rt_builtins_from_darwin_host_toolchain() {
                 if [[ ! -f "${DEST_SIM_LIB_PATH}" ]]; then
                     if [[ -f "${HOST_SIM_LIB_PATH}" ]]; then
                         if [[ "$OS" == "tvos" ]]; then
-                           call lipo -remove i386 "${HOST_SIM_LIB_PATH}" -output "${DEST_SIM_LIB_PATH}"
+                           call lipo -remove i386 "${HOST_SIM_LIB_PATH}" -output "${DEST_SIM_LIB_PATH}" || call cp "${HOST_SIM_LIB_PATH}" "${DEST_SIM_LIB_PATH}"
                         else
                            call cp "${HOST_SIM_LIB_PATH}" "${DEST_SIM_LIB_PATH}"
                         fi