Fix PX4_CMAKE_BUILD_TYPE=Debug configuration

Set CMAKE_RUNTIME_OUTPUT_DIR_DEBUG & _RELEASE to match
CMAKE_RUNTIME_OUTPUT_DIR as is already done in top level CMakeLists.txt.

Fixes Issue 16445 - px4-alias.sh: not found

Co-authored-by: Dan George <dgeorge@anduril.com>

platforms/posix/CMakeLists.txt

@@ -7,6 +7,8 @@ get_property(module_libraries GLOBAL PROPERTY PX4_MODULE_LIBRARIES)
 # CMAKE_CURRENT_BINARY_DIR ''./platforms/posix' to './bin'
 if (NOT CATKIN_DEVEL_PREFIX)
 	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${CMAKE_BINARY_DIR}/bin)
+	set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR}/bin)
 endif()
 
 set(PX4_SHELL_COMMAND_PREFIX "px4-")