ssp: do not use __ssp_protected_ symbol prefixes

This is a NetBSD-specific detail which does not apply to Newlib, causing
linking issues in certain scenarios:

https://cygwin.com/ml/cygwin/2018-01/msg00189.html

Signed-off-by: Yaakov Selkowitz <yselkowi@redhat.com>

newlib/libc/include/ssp/ssp.h

@@ -51,7 +51,6 @@
 		__chk_fail()
 #define __ssp_decl(rtype, fun, args) \
 rtype __ssp_real_(fun) args __asm__(__ASMNAME(#fun)); \
-__ssp_inline rtype fun args __asm__(__ASMNAME("__ssp_protected_" #fun)); \
 __ssp_inline rtype fun args
 #define __ssp_redirect_raw(rtype, fun, args, call, cond, bos) \
 __ssp_decl(rtype, fun, args) \