Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-5.0-pull-request...

Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-5.0-pull-request' into staging

Fix mmap guest space and brk
Add FS/FD/RTC/KCOV ioctls

# gpg: Signature made Thu 23 Jan 2020 08:21:41 GMT
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Laurent Vivier <[email protected]>" [full]
# gpg:                 aka "Laurent Vivier <[email protected]>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <[email protected]>" [full]
# Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F  5173 F30C 38BD 3F2F BE3C

* remotes/vivier2/tags/linux-user-for-5.0-pull-request:
  linux-user: Add support for read/clear RTC voltage low detector using ioctls
  linux-user: Add support for getting/setting RTC PLL correction using ioctls
  linux-user: Add support for getting/setting RTC wakeup alarm using ioctls
  linux-user: Add support for getting/setting RTC periodic interrupt and epoch using ioctls
  linux-user: Add support for getting/setting RTC time and alarm using ioctls
  linux-user: Add support for enabling/disabling RTC features using ioctls
  linux-user: Add support for TYPE_LONG and TYPE_ULONG in do_ioctl()
  linux-user: Add support for KCOV_INIT_TRACE ioctl
  linux-user: Add support for KCOV_<ENABLE|DISABLE> ioctls
  configure: Detect kcov support and introduce CONFIG_KCOV
  linux-user: Add support for FDFMT<BEG|TRK|END> ioctls
  linux-user: Add support for FD<SETEMSGTRESH|SETMAXERRS|GETMAXERRS> ioctls
  linux-user: Add support for FS_IOC32_<GET|SET>VERSION ioctls
  linux-user: Add support for FS_IOC32_<GET|SET>FLAGS ioctls
  linux-user: Add support for FS_IOC_<GET|SET>VERSION ioctls
  linux-user: Reserve space for brk
  linux-user:Fix align mistake when mmap guest space

Signed-off-by: Peter Maydell <[email protected]>