[Bug target/78994] -Ofast makes aarch64 C++ benchmark slower for A53

[tulipawn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78994

--- Comment #4 from PeteVine <tulipawn at gmail dot com> ---
I'm delighted to report **not** targeting Cortex-A53 actually incurs a
performance penalty sometimes ;)

http://openbenchmarking.org/result/1701128-TA-GCCCOMPAR79