Don't use consecutive numbers for basic blocks from different functions.

Don't use consecutive numbers for basic blocks from different functions.

Consecutive numbers can make it difficult to combine assembly output from
different compiler runs, which is done by the check/checkfile scripts to find
bugs in the SPEC suite.  If the number of basic blocks of a function changed
between compiler runs, the assembler will likely complain about duplicate labels.
Leaving a bit more space, e.g. 100, is a pragmatic fix.