Add fallback file for elide.h

Add the missing fallback file for elide.h to fix non x86 builds.
Sorry about that. This is just a noop macro file that makes
all elision code to be optimized out.
m68k: Consolidate NPTL/non versions of vfork
m68k: Consolidate NPTL/non versions of clone
Update Sparc ULPs.

	* sysdeps/sparc/fpu/libm-test-ulps: Update.
Update feature guard for strdup/strndup in <bits/string2.h>
Fix tautological comparison in non-executed part of tst-setuid2 (BZ #17058)

This part never runs with the current implementation
because the setresuid call currently aborts (as intended).
Pass $TIMEOUTFACTOR to tests also in cross testing