Compilation issues on macOS Sierra 10.12.6

[avivbeeri]

I had some errors while running make. Initially it complained about sdcc/bin not being created and then it complained about "SDCC.y:1004:12: error: label at end of compound statement: expected statement default:"

I removed the duplicate break statement here and it all built successfully. Not sure if it might break something though.

gbdk-osx/sdcc/src/SDCC.y

Line 1005 in b72af06

break;

[x43x61x69]

You can send a pull request so I can merge it to master.

Thanks.