Fix the handling of local labels
Fix the handling of local labels

In converting the label system over to the new hash table library,
accidentally broke local labels by prepending the prefix twice.  Fix.

techkey/nasm,Distrotech/nasm,turingstudio/nasm,projedi/nasm,Distrotech/nasm,letolabs/nasm,turingstudio/nasm,letolabs/nasm,techkey/nasm,projedi/nasm,projedi/nasm,letolabs/nasm,projedi/nasm,turingstudio/nasm,Distrotech/nasm,techkey/nasm,turingstudio/nasm,techkey/nasm,Distrotech/nasm,techkey/nasm,projedi/nasm