Update header names

Signed-off-by: Ben Taylor <ben.taylor@linaro.org>
diff --git a/programs/fuzz/fuzz_x509crt.c b/programs/fuzz/fuzz_x509crt.c
index 29331b9..c99ae2e 100644
--- a/programs/fuzz/fuzz_x509crt.c
+++ b/programs/fuzz/fuzz_x509crt.c
@@ -2,7 +2,7 @@
 
 #include <stdint.h>
 #include "mbedtls/x509_crt.h"
-#include "common.h"
+#include "fuzz_common.h"
 
 int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
 {