update submodules

[lukileczo]

• libphoenix ffca1e6...29afcd9 (7):

  pthread: use mutex/cond attributes
  sys/threads: add function to create cond with attributes
  sys/threads: add function to create mutex with attributes
  stdint: fix definitions of min limits of exact-width integer types
  pthread_key_create: fix null pointer check
  stdint: fix definitions of limits of exact-width integer types
  time: implement clock_settime

• phoenix-rtos-build a1897d6...f5caf89 (2):

  build.subr: Make b_install accept multiple source files
  target: Add -fstack-usage for all armv7m architectures

• phoenix-rtos-kernel 963bf56...8c260ab (5):

  proc/cond: use clock attributes
  !add attributes to condvars
  !add attributes to mutexes
  proc/lock: add attributes to locks
  armv7a: align ustack in hal_cpuCreateContext

• phoenix-rtos-tests 022f090...ab7a721 (1):

  sys: implement tests for native mutex and cond API

Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: (list targets here).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

7 676 tests  +216   6 961 ✅ +216   37m 5s ⏱️ - 1m 5s
  436 suites + 16     715 💤 ±  0 
    1 files   ±  0       0 ❌ ±  0 

Results for commit 077ebf5. ± Comparison against base commit 73deba6.