Don't meddle with stdlib
Don't meddle with stdlib

Forgotten part of #1014: -stdlib should not be changed. It breaks build on e.g. FreeBSD where libc++ is used.
PurpleI2P/i2pd,hypnosis-i2p/i2pd,majestrate/i2pd,hypnosis-i2p/i2pd,majestrate/i2pd,brain5lug/i2pd,majestrate/i2pd,hypnosis-i2p/i2pd,brain5lug/i2pd,majestrate/i2pd,brain5lug/i2pd,hypnosis-i2p/i2pd,brain5lug/i2pd,majestrate/i2pd,PurpleI2P/i2pd,PurpleI2P/i2pd,PurpleI2P/i2pd,hypnosis-i2p/i2pd