build failure with glibc-2.11 on ia64 due to ifunc code

[Mike Frysinger]

commit bc5e8462188bdd9919e804fbba44e4b983b7724a added to elf/dl-sym.c:
	value = ((DL_FIXUP_VALUE_TYPE (*) (void)) DL_FIXUP_VALUE_ADDR (value)) ();

where value is a void *.

but on ia64 where DL_FIXUP_VALUE_TYPE expands to struct fdesc, this causes a 
build failure:
dl-sym.c: In function 'do_sym':
dl-sym.c:197: error: incompatible types when assigning to type 'void *' from 
type 'struct fdesc'
-mike
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