package-win32.sh: ensure that we copy the COPYRIGHT file over to the Win32 binary package.

util/package-win32.sh

@@ -8,7 +8,7 @@ if [ -d $name ]; then
 fi
 mkdir $name || exit 1
 cp -r resty nginx.exe luajit.exe lua51.dll lua include lualib html conf logs $name/ || exit 1
-cp COPYRIGHT $name/
+cp COPYRIGHT $name/ || exit 1
 cp /c/MinGW/bin/libgcc_s_dw2-1.dll $name/ || exit 1
 cd $name || exit 1
 PATH=/c/Strawberry/perl/bin:$PATH cmd /c 'pl2bat.bat resty' || exit 1