Change attribute((option(...))) to attribute((target(...))); Do not allocate tree...

Change attribute((option(...))) to attribute((target(...))); Do not allocate tree nodes on x86 for builtins until we generate code for the ISA; Delete hot/cold functions changing optimization; Make C++ support target specific functions; Add #pragma GCC {push_options,pop_options,reset_options} instead of #pragma GCC {target,optimize} {push,reset,pop}

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@139812 138bc75d-0d04-0410-961f-82ee72b054a4