Merge commit '66d5499b3754b83c09487259c08fe2ce73188a59' into upstream-merge

Merge commit '66d5499b3754b83c09487259c08fe2ce73188a59' into upstream-merge

* commit '66d5499b3754b83c09487259c08fe2ce73188a59': (66 commits)
  Add ability to disable build of all targets
  RTC: Remove the current_tm field
  RTC: Get and set time without going through s->current_tm
  RTC: Do not fire timer periodically to catch next alarm
  RTC: Add divider reset support
  RTC: Update the RTC clock only when reading it
  vmstate: add VMSTATE_TIMER_V
  RTC: Update interrupt state when interrupts are masked/unmasked
  RTC: introduce RTC_CLOCK_RATE
  RTC: Rename rtc_timer_update
  RTC: Remove the logic to update time format when DM bit changed
  socket: don't attempt to reconnect a TCP socket in server mode
  use --libexecdir instead of ignoring it first and reinventing it later
  hw/mcf5206: Fix buffer overflow for MBAR read / write
  target-arm: Fix potential buffer overflow
  hw/wm8750: Fix potential buffer overflow
  tcg/s390: fix ld/st with CONFIG_TCG_PASS_AREG0
  target-s390x: switch to AREG0 free mode
  target-s390x: avoid AREG0 for misc helpers
  target-s390x: avoid AREG0 for condition code helpers
  ...

Conflicts:
	configure

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>