do not try to use -std=c++11 after all
do not try to use -std=c++11 after all

The very same libstdc++ that breaks with clang and -std=gnu++0x
has also the ABI breakage that prevents using C++11 anyway.
Moreover, there's still the idea that we should preferably use
the gnu variant, just like the default is -std=gnu++98, rather
than strict C++11 (the gcc manpage for -ansi e.g. says that
some builtins are disabled in this case).

Change-Id: I4dac01374ee7a34796161f6e0e76eb962953e709

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core