vppinfra: don't fail if config.h is missing, fallback to defaults instead

Type: improvement
Change-Id: Idc82d40a16cbc8a401a8fb359bc63083f47361b9
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h
index 7cdf4a4..ade7e5f 100644
--- a/src/vppinfra/clib.h
+++ b/src/vppinfra/clib.h
@@ -39,7 +39,10 @@
 #define included_clib_h
 
 #include <stddef.h>
+
+#if __has_include(<vppinfra/config.h>)
 #include <vppinfra/config.h>
+#endif
 
 #ifdef  __x86_64__
 #include <x86intrin.h>