PX4-NuttX/nuttx branch test: px4-master_auto_rebase

NuttX:
 - https://github.com/PX4-NuttX/nuttx/tree/px4-master_auto_rebase
 - PX4/NuttX@37cfd48

Changes from PX4-NuttX/nuttx (PX4/NuttX@6377532) in current PX4/master (1fac3a1)
PX4/NuttX@6377532...37cfd48

37cfd48 (HEAD, origin/px4-master_auto_rebase) [PX4: WIP] Fix transmission status handling in the serial interrupt
d18544d [PX4: REJECTED] cstdint fix
108854c [PX4: REJECTED] add math.h
3cf0987 [PX4: WIP] Jenkinsfile
691676a (origin/master) Eliminate some new warnings found in build testing.
95aa9be configs/misoc:  Fix misoc 'board' configuration so that it survives a refresh and is consistent with other board configurations.
20d9d1a configs/:  Disable debug options in all default configurations.  The idea is that these are all release configurations and should present the best performance and smallest footprint.  If debug output is desired for debugging purposes, then these release configurations can simply be changes to debug configurations be simply re-enabling the debug options.
668df01 Committed defconfigs for working configurations should never have CONFIG_EXPERIMENTAL set because the opens the doors for untested and incomplete configurations.  Conversely, if there are released configurations that use features with dependencies on CONFIG_EXPERIMENTAL, then those configurations are in use and those dependencies should be removed:
a8145c0 Update COPYING
75220e2 arch/arm/src/stm32h7: Correct permissions on several files.

Apps:
 - https://github.com/PX4-NuttX/apps/tree/px4-master_auto_rebase
 - PX4/NuttX-apps@258b0dc

Changes from PX4-NuttX/apps (PX4/NuttX-apps@36806ba) in current PX4/master (1fac3a1)
PX4/NuttX-apps@36806ba...258b0dc

258b0dc (HEAD -> px4-master_auto_rebase, origin/px4-master_auto_rebase) [REJECTED] add-var-expansion-in-nsh-parse.patch
e853fb4 (origin/master) apps/wireless/wapi:  Remove dependency on CONFIG_EXPERIMENTAL from Kconfig
133f239 Merged in raiden00/apps (pull request #141)
e4a30d5 apps/Make.defs:  Simplify last fix
bf23277 apps/Make.defs:  Fix an error introduced with recent chagne.  MKKCONFIG may not be defined resulting in failure to create apps/Kconfig.
36e04b3 apps/examples/gps:  Add GPS example using MINMEA lib
6aad29e apps/gpsutils/minmea: Include wchar.h in minmea.c file to fix wint_t error
301fe28 Merge branch 'master' of bitbucket.org:nuttx/apps
67e6e33 Merged in masayuki2009/nuttx.apps/taskset_command (pull request #140)
c36a5c1 apps/examples/ostest:  Signal handling tests should use the same configurable stack size as used in other tests, not PTHREAD_STACK_DEFAULT.