stdio: Remove the usage of $(fno-unit-at-a-time) for errlist.c

The errlist.c is built with -fno-toplevel-reorder to avoid compiler to
reorder the compat assembly directives due an assembler issue [1]
(fixed on 2.39).

This patch removes the compiler flags by split the compat symbol
generation in two phases.  First the _sys_errlist_internal internal
without any compat symbol directive is preprocessed to generate an
assembly source code.  This generate assembly is then used as input
on a platform agnostic errlist-data.S which then creates the compat
definitions.  This prevents compiler to move any compat directive
prior the _sys_errlist_internal definition itself.

Checked on a make check run-built-tests=no on all affected ABIs.

[1] https://sourceware.org/bugzilla/show_bug.cgi?id=29012

sysdeps/unix/sysv/linux/errlist-compat.h

@@ -20,6 +20,7 @@
 #define _ERRLIST_COMPAT_H
 
 #include <shlib-compat.h>
+#include <limits.h>
 
 /* Define new compat symbols for symbols  _sys_errlist, sys_errlist,
    _sys_nerr, and sys_nerr for version VERSION with NUMBERERR times number of
@@ -27,17 +28,25 @@
    Both _sys_errlist and sys_errlist alias to _sys_errlist_internal symbol
    (defined on errlist.c) while _sys_nerr and sys_nerr created new variable
    with the expected size.  */
-#define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) 			     \
-  const int __##VERSION##_sys_nerr = NUMBERERR;				     \
-  strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr); 	     \
-  declare_symbol_alias (__ ## VERSION ## _sys_errlist, _sys_errlist_internal,\
-			object, NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH));    \
-  declare_symbol_alias (__ ## VERSION ## __sys_errlist,			     \
-			_sys_errlist_internal, object,			     \
-			NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH));	     \
-  compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION);	     \
-  compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);      \
-  compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION);  \
-  compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION);\
+#ifdef __ASSEMBLER__
+# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) 			    \
+  declare_object_symbol_alias (__ ## VERSION ## _sys_errlist,		    \
+			       _sys_errlist_internal,			    \
+			       NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH))	    \
+			       ASM_LINE_SEP				    \
+  declare_object_symbol_alias (__ ## VERSION ## __sys_errlist,		    \
+			       _sys_errlist_internal, 			    \
+			       NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH))	    \
+			       ASM_LINE_SEP				    \
+  compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION)  \
+		 ASM_LINE_SEP						    \
+  compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION)
+#else
+# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) 			    \
+  const int __##VERSION##_sys_nerr = NUMBERERR;				    \
+  strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr);	    \
+  compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION);	    \
+  compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);
+#endif
 
 #endif