floatformat.h: Add bfloat16 support.
This change is motivated by a patchset that adds bfloat16 debugging
support for new avx512 instructions to GDB. The gdb thread can be found
here: https://sourceware.org/pipermail/gdb-patches/2020-July/170820.html
include:
2020-08-17 Felix Willgerodt <felix.willgerodt@intel.com>
* floatformat.h (floatformat_bfloat16_big): New.
(floatformat_bfloat16_little): New.
libiberty:
2020-08-17 Felix Willgerodt <felix.willgerodt@intel.com>
* floatformat.c (floatformat_bfloat16_big): New.
(floatformat_bfloat16_little): New.