Temporary define HAVE_SYSCONF until cmake checks are done.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@78546 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/enable_execute_stack.c b/lib/enable_execute_stack.c
index 07c1645..b349d2f 100644
--- a/lib/enable_execute_stack.c
+++ b/lib/enable_execute_stack.c
@@ -13,7 +13,9 @@
 
 /* #include "config.h"
  * FIXME: CMake - include when cmake system is ready.
+ * Remove #define HAVE_SYSCONF 1 line.
  */
+#define HAVE_SYSCONF 1
 
 #ifndef __APPLE__
 #include <unistd.h>