Pass empty suffix to sed on macOS (#598)

foreign_cc/private/shell_toolchain/toolchains/impl/macos_commands.bzl

@@ -55,7 +55,7 @@ def replace_in_files(dir, from_, to_):
     return FunctionAndCall(
         text = """\
 if [ -d "$1" ]; then
-    find -L -f $1 \\( -name "*.pc" -or -name "*.la" -or -name "*-config" -or -name "*.cmake" \\)     -exec sed -i -e 's@'"$2"'@'"$3"'@g' {} ';'
+    find -L -f $1 \\( -name "*.pc" -or -name "*.la" -or -name "*-config" -or -name "*.cmake" \\)     -exec sed -i '' -e 's@'"$2"'@'"$3"'@g' {} ';'
 fi
 """,
     )