[commit/mips] For elf_flags, use the previous arch

[Andrew Cagney]

> On Thu, Jan 08, 2004 at 12:06:25AM -0500, Andrew Cagney wrote:
> 
>> Hello,
>> 
>> This fixes a subtle edge case.  Given the sequence:
>> 
>> 	(gdb) file foo

this changes:
	elf_flags 0 -> 0x<something>
	fpu_type 0 -> 0

>> 	(gdb) set mipsfpu none

this was changing:
	elf_flags 0x<something> -> 0
	fpu_type 0 -> 2
but should have changed:
	elf_flags 0x<something> -> 0x<something>
	fpu_type 0 -> 2

>> 	(gdb) file foo

this was changing:
	elf_flags 0 -> 0x<something>
	fpu_type 2 -> 2
but should have changed:
	elf_flags 0x<something> -> 0x<something>
	fpu_type 2 -> 2
i.e., no change

>> 
>> An extra, unnecessary arch was being created after the second "file foo".
> 
> 
> After the "file foo"?  I'm confused as to how this case can trigger,
> since we ought to have info.abfd at that point, right?

Andrew