Store USE_DLMALLOC in vppinfra/config.h

Change-Id: Ib596e7f525b83dc7e830bcf6a126cd210216ce86
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h
index 42748b0..a6f8824 100644
--- a/src/vppinfra/clib.h
+++ b/src/vppinfra/clib.h
@@ -38,6 +38,8 @@
 #ifndef included_clib_h
 #define included_clib_h
 
+#include <vppinfra/config.h>
+
 /* Standalone means to not assume we are running on a Unix box. */
 #if ! defined (CLIB_STANDALONE) && ! defined (CLIB_LINUX_KERNEL)
 #define CLIB_UNIX