pax-utils.eclass: do not attempt to create/convert a PT_PAX_FLAGS program header
Support for the creation of PT_PAX_FLAGS program headers in ELF objects is being
dropped in >=sys-devel/binutils-2.26.1. Running paxctl -C or -c either to create
a PT_PAX_FLAGS header or to convert a PT_GNU_STACK header on such ELF objects
results in broken executables. For backwards compatibility we continue to support
PT_PAX_FLAGS markings with paxctl but remove these unsafe methods from the eclass.
Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=590422
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