Update BoringSSL benchmark to use C++17 #4969

Job	Run time
grpc	25m 43s
socat	4m 51s
haproxy	3m 12s
ntp	2m 32s
tcpdump	2m 33s
tpm2-tss	1m 17s
trousers	2m 11s
bind9	5m 17s
Cyrus-SASL	1m 14s
libevent	28m 47s
nmap	2m 30s
OpenLDAP	17m 9s
openvpn2-6	4m 14s
openvpnMaster	4m 25s
Python main	4m 1s
Python releases (FIPS=0 OPENSSL_IN_CRT=0)	12m 45s
Ruby releases (FIPS=0)	7m 47s
strongswan	1m 48s
Python releases (FIPS=1 OPENSSL_IN_CRT=0)	12m 52s
Ruby releases (FIPS=1)	7m 25s
Python releases (FIPS=0 OPENSSL_IN_CRT=1)	12m 12s
Python releases (FIPS=1 OPENSSL_IN_CRT=1)	12m 3s
amazon-corretto-crypto-provider	21m 44s
	3h 18m 32s

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