[parisc-linux] bad asm comments

[Alan Modra]

And yet some more glibc files need patching

configure.in
config.h.in
configure
include/libc-symbols.h 
sysdeps/unix/sysv/linux/hppa/sysdep.h

The configury changes are so we can get the line separator and comment
char right for include/libc-symbols.h, which uses multiple assembler
instructions per cpp macro.  I can see why there was a strong desire to
use `;' as the line separator...

Alan Modra
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