Update bmakecommon.mpt

Silence clang warnings

Author: jwillemsen

templates/bmakecommon.mpt

@@ -96,7 +96,7 @@ binary_flags = -tR -tD
 thr_flags = -tM
 lib_ext = .lib
 common_defines = WIN32 _WINDOWS WIN64
-common_flags =
+common_flags = -Qunused-arguments
 obj_ext = .o
 linker_paths = -L\"$(BDS)\lib\win64x\debug\" -L\"$(BDS)\lib\win64x\release\" -L\"$(BDS)\x86_64-w64-mingw32\lib\" -L\"$(BDS)\lib\clang\15.0.7\lib\windows\"
 startup_bits = 64