CppUnit tests crash with link-time optimizations enabled

[amadio]

To reproduce, please run

CXXFLAGS='-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing' ctest -VV -S test.cmake

These are the tests that currently fail:

The following tests FAILED:
	  6 - XrdCl::Poller (SEGFAULT)
	  7 - XrdCl::Socket (SEGFAULT)
	  8 - XrdCl::Utils (SEGFAULT)
	  9 - XrdEc::AlignedWriteTest (SEGFAULT)
	 10 - XrdEc::SmallWriteTest (SEGFAULT)
	 11 - XrdEc::BigWriteTest (SEGFAULT)
	 12 - XrdEc::VectorReadTest (SEGFAULT)
	 13 - XrdEc::IllegalVectorReadTest (SEGFAULT)
	 14 - XrdEc::AlignedWrite1MissingTest (SEGFAULT)
	 15 - XrdEc::AlignedWrite2MissingTest (SEGFAULT)
	 16 - XrdEc::AlignedWriteTestIsalCrcNoMt (SEGFAULT)
	 17 - XrdEc::SmallWriteTestIsalCrcNoMt (SEGFAULT)
	 18 - XrdEc::BigWriteTestIsalCrcNoMt (SEGFAULT)
	 19 - XrdEc::AlignedWrite1MissingTestIsalCrcNoMt (SEGFAULT)
	 20 - XrdEc::AlignedWrite2MissingTestIsalCrcNoMt (SEGFAULT)

I believe migrating them to GoogleTest will fix these problems. See also: https://bugs.gentoo.org/877535.

[amadio]

Closing this, as the fixes are merged into devel already.