src/meta-openembedded:libplist: upgrade 2.2.0 -> 2.3.0

Changelog:
=========
- Changes:
  * Rename PLIST_UINT to PLIST_INT and add plist_new_int() and plist_get_int_val()
  * Add support for JSON format
  * Add support for OpenStep format
  * Introduce error codes and format constants
  * Add return value to import/export functions to allow returning error codes
  * Add new plist_sort function
  * Add several human-readable output-only formats
  * Add new plist_write_to_string/_stream/_file functions
  * Add new plist_print function
  * Add new plist_read_from_file function
  * Add new plist_mem_free() function
  * Add a few C++ methods
  * Add C++ interface test
  * Add PLIST_NULL type
  * Some code housekeeping (mostly clang-tidy)
- Breaking:
  * plist_from_memory() gets additional parameter
- Bugfixes:
  * Fix multiple bugs in all of the parsers
  * Fix handling of PLIST_UID nodes

Signed-off-by: Wang Mingyu <[email protected]>
Signed-off-by: Khem Raj <[email protected]>