Include config.h to pick up data layout pragmas.

[WINDOWSNT]: Remove explicit pragma.

src/lastfile.c

@@ -36,16 +36,18 @@ Boston, MA 02111-1307, USA.  */
  coming from libraries.
 */
 
+#include <config.h>
+
 char my_edata[] = "End of Emacs initialized data";
 
 #ifdef WINDOWSNT
-#pragma bss_seg("EMBSS")
 /* Help unexec locate the end of the .bss area used by Emacs (which
    isn't always a separate section in NT executables).  */
 char my_endbss[1];
-#endif
+
 /* The Alpha MSVC linker globally segregates all static and public bss
    data, so we must take both into account to determine the true extent
    of the bss area used by Emacs.  */
 static char _my_endbss[1];
 char * my_endbss_static = _my_endbss;
+#endif