Unbreak compilation due to missing #define.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@2413 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/stage1.c b/coregrind/stage1.c
index 389e2c6..9baf531 100644
--- a/coregrind/stage1.c
+++ b/coregrind/stage1.c
@@ -134,7 +134,9 @@
 	 break;
 
       case AT_SYSINFO:
+#ifdef AT_SYSINFO_EHDR
       case AT_SYSINFO_EHDR:
+#endif
 	 auxv->a_type = AT_IGNORE;
 	 break;
       }