re PR sanitizer/84761 (AddressSanitizer is not compatible with glibc 2.27 on x86)

re PR sanitizer/84761 (AddressSanitizer is not compatible with glibc 2.27 on x86)

	PR sanitizer/84761
	* sanitizer_common/sanitizer_linux_libcdep.cc (__GLIBC_PREREQ):
	Define if not defined.
	(DL_INTERNAL_FUNCTION): Don't define.
	(InitTlsSize): For __i386__ if not compiled against glibc 2.27+
	determine at runtime whether to use regparm(3), stdcall calling
	convention for older glibcs or normal calling convention for
	newer glibcs for call to _dl_get_tls_static_info.

From-SVN: r258663