Merge branch 'docs/linux_host_add_libbsd' into 'master'

[docs]: Corrected Linux host test requirements

See merge request espressif/esp-idf!15556

Author: 0xjakob

docs/en/api-guides/linux-host-testing.rst

@@ -60,6 +60,8 @@ The :component_file:`NVS page unit test <nvs_flash/host_test/nvs_page_test/main/
 Requirements
 ^^^^^^^^^^^^
 
-Besides the usual IDF requirements and CMock requirements, only the host's ``GCC/g++`` is required.
+- Installed IDF including all IDF requirements
+- CMock requirements (``Ruby``)
+- ``libbsd``
 
 The host tests have been tested on Ubuntu 20.04 with ``GCC`` version 9 and 10.