Update CMakeLists.txt

Replace with `execute_process` available on v3.0+

CMakeLists.txt

@@ -179,11 +179,8 @@ endif()
 # https://github.com/ffainelli/uClibc/blob/266bdc1/libc/misc/locale/locale.c#L1322
 # So, if it looks like we're compiling for a system like that just disable
 # locale handling entirely.
-if (CMAKE_VERSION GREATER_EQUAL "3.28")
-  execute_process (COMMAND ${CMAKE_C_COMPILER} -dumpmachine ERROR_QUIET OUTPUT_VARIABLE CMAKE_GNU_C_MACHINE)
-else ()
-  exec_program(${CMAKE_C_COMPILER} ARGS -dumpmachine OUTPUT_VARIABLE CMAKE_GNU_C_MACHINE)
-endif ()
+execute_process (COMMAND ${CMAKE_C_COMPILER} -dumpmachine ERROR_QUIET OUTPUT_VARIABLE CMAKE_GNU_C_MACHINE)
+
 if (CMAKE_GNU_C_MACHINE MATCHES "uclibc")
 	message(STATUS "Detected uClibc compiler, disabling locale handling")
 	set(HAVE_SETLOCALE 0)