MFH: r456086

textproc/ansifilter: require C++11 toolchain (on powerpc*, mips*, sparc*)

cc1plus: error: unrecognized command line option "-std=c++11"

main.cpp:118:5: error: use of undeclared identifier 'unique_ptr'

unique_ptr<ansifilter::CodeGenerator> generator(ansifilter::CodeGenerator::getInstance(op...
^

Reported by: pkg-fallout (mips64)
Approved by: ports-secteam blanket