Update Board_Defs.h
Update Board_Defs.h

To satisfy our board variant, we broke out pins 11 and 12 for serial1! Thanks!
pontech/chipKIT-core,EmbeddedMan/chipKIT-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,pontech/chipKIT-core,adamwolf/chipKIT-core,EmbeddedMan/chipKIT-core,ricklon/chipKIT-core,pontech/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,chipKIT32/chipkit-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,adamwolf/chipKIT-core,ricklon/chipKIT-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,EmbeddedMan/chipKIT-core,EmbeddedMan/chipKIT-core,chipKIT32/chipkit-core,adamwolf/chipKIT-core,pontech/chipKIT-core,ricklon/chipKIT-core