fix broken build flag "-M WLEDMM" (should be "-D")

Author: softhack007

platformio.ini

@@ -422,7 +422,7 @@ lib_deps = ${esp32_idf_V4.lib_deps}
 monitor_filters = esp32_exception_decoder
 
 ;; Compatibility with upstream --> you should prefer using ${common_mm.build_flags_S} and ${common_mm.lib_deps_S}
-AR_build_flags = ${common_mm.AR_build_flags} -M WLEDMM
+AR_build_flags = ${common_mm.AR_build_flags} -D WLEDMM
 AR_lib_deps = ${common_mm.AR_lib_deps}      ;; optimized version, 10% faster on -S2/-C3
 board_build.partitions = ${esp32.default_partitions}   ;; default partioning for 4MB Flash - can be overridden in build envs
 board_build.f_flash = 80000000L