Assembler: include directive tickled Clang error
Assembler: include directive tickled Clang error

Recent versions of clang are smart enough to detect snprintf()
truncation.  Fix that with a slightly more involved calculation
for a temporary buffer size.

Signed-off-by: Dan Cross <d694442fc1cc3abfa1258245de9be14c2a2962da@gmail.com>

BSVC/bsvc,BSVC/bsvc,BSVC/bsvc,BSVC/bsvc