cc/gcc: diable libsanitizer without NPTL

gcc-4.8 comes with a new library to sanitise memory access:
- heap-, stack-, and global-buffer overflow, use-after-free
- data-races between threads

This library requires some _np parts of the API, which are not
implemented in the (old) LinuxThreads, which is still available
in uClibc.

Since NPTL requires a i486 or above, i386 are stuck with using LT,
which precludes building the libsanitizer.

Disable libsanitizer, a bit like libatomic is.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Niels Penneman <niels@penneman.org>

 diff -durN glibc-cvs-2.9.orig/misc/syslog.c glibc-cvs-2.9/misc/syslog.c

 --- glibc-cvs-2.9.orig/misc/syslog.c	2009-06-01 10:16:50.000000000 +0200

 +++ glibc-cvs-2.9/misc/syslog.c	2009-06-01 10:17:20.000000000 +0200

 @@ -152,7 +152,7 @@

  #define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID

  	/* Check for invalid bits. */

  	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {

 -		syslog(INTERNALLOG,

 +		__syslog(INTERNALLOG,

  		    "syslog: unknown facility/priority: %x", pri);

  		pri &= LOG_PRIMASK|LOG_FACMASK;

  	}