Fix dependencies and includes without FS_IO and PLATFORM_C
diff --git a/library/ccm.c b/library/ccm.c
index 60477d0..72d766b 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -340,6 +340,7 @@
#if defined(POLARSSL_PLATFORM_C)
#include "polarssl/platform.h"
#else
+#include <stdio.h>
#define polarssl_printf printf
#endif
diff --git a/library/entropy.c b/library/entropy.c
index 7f95317..bc7fb0f 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -385,6 +385,7 @@
#if defined(POLARSSL_PLATFORM_C)
#include "polarssl/platform.h"
#else
+#include <stdio.h>
#define polarssl_printf printf
#endif