K 10
svn:author
V 3
kan
K 8
svn:date
V 27
2018-05-13T21:46:05.758830Z
K 7
svn:log
V 300
Upgrade ext-toolchain GCC ports to GCC 6.4.0

This is the latest supported release in GCC 6.x series.
Drop aarch64 support patch - it has been committed upstream.

Enable ifunc suppport by default.

PR:	228161
Reviewed by: bapt (update part)
Differential Revision:	https://reviews.freebsd.org/D13602

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