Fix '--enable-intl' problem when configuring on osx php5.3

'make' command fails when you configure php5.3 with '--enable-intl' option on osx.
This is a patch for it.

http://www.spinics.net/lists/php-install/msg01707.html

    1 warning generated.
    Undefined symbols for architecture x86_64:
      "std::terminate()", referenced from:
          ___clang_call_terminate in msgformat_helpers.o
      "___cxa_begin_catch", referenced from:
          ___clang_call_terminate in msgformat_helpers.o
      "___gxx_personality_v0", referenced from:
          _umsg_format_helper in msgformat_helpers.o
          _umsg_parse_helper in msgformat_helpers.o
          Dwarf Exception Unwind Info (__eh_frame) in msgformat_helpers.o
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    make: *** [libs/libphp5.bundle] Error 1