Skip modifying exception mask and flags in SET_RESTORE_ROUND_53BIT

We only need to set/restore rounding mode to ensure correct
computation for non-default rounding modes.
Properly handle %W in strptime
Add #include <stdint.h> to locale/gen-translit.pl and fix C-translit.h.
Remove trailing whitespace in ports.
Remove trailing whitespace.
Fix executable mode.
BZ #15583: r7 uninitialized in strcpy.S when ARM_HAS_T2 undefined
Remove trailing whitespace in nptl.
Fix ChangeLog.