Create alternative name for local symbols.

Summary:
If a profile data was collected on a stripped binary but an input
to BOLT is unstripped, we would use a different mangling scheme for
local functions and ignore their profiles. To solve the issue this
diff adds alternative name for all local functions such that one
of the names would match the name in the profile.

If the input binary was stripped, we reject it, unless "-allow-stripped"
option was passed. It's more complicated to do a matching in this case
since we have less information than at the time of profile collection.
It's also not that simple to tell if the profile was gathered on a
stripped binary (in which case we would have no issue matching data).

(cherry picked from FBD3548012)