Latest .weakext patch to mips/iris6.h

[Jason Merrill]

>>>>> Martin Knoblauch <knobi@rocketmail.com> writes:

 >  after looking at your change to mips/iris6.h, I believe
 > the ASM_OUTPUT_LABEL belongs into the ASM_WEAKEN_LABEL macro
 > insted of the ASM_OUTPUT_WEAK_ALIAS macro. If you want to put
 > it there, it belongs into the case where VALUE is NULL.
 > With the current version, the mipsPRO assembler may complain
 > about multiple ".globl" definitions if VALUE is non-NULL.

Huh?  The .globl is for the alias (NAME) symbol, not the real (VALUE)
symbol.

Jason