UT stub library missing "shell" API

[jphickey]

Describe the bug
The osapi-shell-stubs.c file was not included in the ut_osapi_stubs library, and hence apps needing to test shell functions will get a linker error due to this missing function.

To Reproduce
Attempt to build the unit test for an app that calls OS_ShellOutputToFile API. Link fails with the missing symbol.

Expected behavior
Build should succeed.

Code snips
List is here. The "shell" stub file is there (generated from header) but was missed/omitted from the library somehow.

osal/src/ut-stubs/CMakeLists.txt

Lines 55 to 97 in f11d049

	add_library(ut_osapi_stubs STATIC
	utstub-helpers.c
	osapi-binsem-stubs.c
	osapi-binsem-handlers.c
	osapi-clock-stubs.c
	osapi-clock-handlers.c
	osapi-common-stubs.c
	osapi-countsem-stubs.c
	osapi-countsem-handlers.c
	osapi-dir-stubs.c
	osapi-dir-handlers.c
	osapi-error-stubs.c
	osapi-error-handlers.c
	osapi-file-stubs.c
	osapi-file-handlers.c
	osapi-filesys-stubs.c
	osapi-filesys-handlers.c
	osapi-heap-stubs.c
	osapi-heap-handlers.c
	osapi-idmap-stubs.c
	osapi-idmap-handlers.c
	osapi-module-stubs.c
	osapi-module-handlers.c
	osapi-mutex-stubs.c
	osapi-mutex-handlers.c
	osapi-network-stubs.c
	osapi-network-handlers.c
	osapi-printf-stubs.c
	osapi-printf-handlers.c
	osapi-queue-stubs.c
	osapi-queue-handlers.c
	osapi-select-stubs.c
	osapi-sockets-stubs.c
	osapi-sockets-handlers.c
	osapi-task-stubs.c
	osapi-task-handlers.c
	osapi-timer-stubs.c
	osapi-timer-handlers.c
	osapi-timebase-stubs.c
	osapi-timebase-handlers.c
	osapi-version-stubs.c
	osapi-version-handlers.c
	)

Reporter Info
Joseph Hickey, Vantage Systems, Inc.