Update copyright notices with scripts/update-copyrights
Update remaining copyright dates

Update copyright years that are not handled by scripts/update-copyright.
scripts/update-copyrights: adjust configure input file suffix
Regenerate x86 / x86_64 ulps.
Regenerate MIPS ulps.
Regenerate ARM ulps.
[AArch64] Pointer mangling support for AArch64.
[AArch64] Define ABORT_INSTRUCTION.
[AArch64] Regenerate libm-test-ulps.