Git rid of global buffer 'outbuf'and related macro definitions.
Use VG_(fdprintf).


git-svn-id: svn://svn.valgrind.org/valgrind/branches/BUF_REMOVAL@14352 a5019735-40e9-0310-863c-91ae7b9d1cf9
Get rid of my_fwrite.


git-svn-id: svn://svn.valgrind.org/valgrind/branches/BUF_REMOVAL@14354 a5019735-40e9-0310-863c-91ae7b9d1cf9
Get rid of fixed size buffer in mangled_cxt.
Update the FIXME at the call site.


git-svn-id: svn://svn.valgrind.org/valgrind/branches/BUF_REMOVAL@14355 a5019735-40e9-0310-863c-91ae7b9d1cf9