tests/ztest/fail: Fix build for native_sim

The final executable output from the native_sim
(or native_posix) build is zephyr.exe
(in native_posix zephyr.elf happened to be just a copy of
the exe, but in native_sim it is an intermediate build step)

So we need to use the exe instead.

Note: As the exe is generated with a custom target, we need
to install it using install(FILES), which also requires the
destination and permissions to be listed manually. The
permissions set are just the cmake default permissions
for install(PROGRAMS).

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

tests/ztest/fail/CMakeLists.txt

@@ -4,7 +4,7 @@
 cmake_minimum_required(VERSION 3.20.0)
 include(ExternalProject)
 
-# Add the sources and set up the build for either unit testing or native_posix
+# Add the sources and set up the build for either unit testing or native_sim
 list(APPEND SOURCES src/main.cpp)
 if(BOARD STREQUAL unit_testing)
   find_package(Zephyr COMPONENTS unittest REQUIRED HINTS $ENV{ZEPHYR_BASE})
@@ -17,7 +17,7 @@ else()
   set(target app)
   # Set the target binary for the 'core' external project. The path to this must match the one set
   # below in ExternalProject_Add's CMAKE_INSTALL_PREFIX
-  add_compile_definitions(FAIL_TARGET_BINARY="${CMAKE_BINARY_DIR}/core/bin/zephyr.elf")
+  add_compile_definitions(FAIL_TARGET_BINARY="${CMAKE_BINARY_DIR}/core/bin/zephyr.exe")
 endif()
 
 # Create the project and set the sources for the target

tests/ztest/fail/core/CMakeLists.txt

@@ -35,5 +35,9 @@ else()
 
   target_sources(app PRIVATE ${SOURCES})
   target_include_directories(app PRIVATE include)
-  install(TARGETS ${logical_target_for_zephyr_elf})
+  install(FILES ${APPLICATION_BINARY_DIR}/zephyr/${KERNEL_EXE_NAME}
+    DESTINATION bin/
+    PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ
+      WORLD_EXECUTE WORLD_READ
+  )
 endif()