* lib/gas-defs.exp (objdump): New proc.

* lib/gas-defs.exp (objdump): New proc.
(objdump_start): Deleted unused proc.
(objdump_start_common): Merged into objdump_start_no_subdir.

* gas/alpha/fp.exp: Use objdump instead of objdump_start_no_subdir, since the
former actually waits for objdump to finish.  Specify .rdata section only.
Make comment indicate Alpha architecture rather than SPARC.
* gas/alpha/fp.d: Omit .reginfo patterns.  Just use "." to match
against ASCII code 0x2a ("*", special in regexp).
* gas/sun4/addend.exp: Use objdump instead of objdump_start_no_subdir.