[kaffe] Configure mischeck

[Guilhem Lavaux]

Hi again,

I have noticed that, on new GLIBC systems, configure complains about 
asm/signal.h, asm/sigcontext.h, linux/netlink.h and linux/rtnetlink.h. 
Apparently they are there but cannot be compiled because of the GLIBC 
volontary incompatible includes. I have so written a new macro to detect the 
presence of __GLIBC__ and only test linux headers if it is not found. This 
removes the complaints of the latest autoconf.

I have attached the new file and the patch to configure.in to this mail.

Guilhem.
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