include needed file for uint8_t def

Upstream yocto appears to have removed a free include that provided the
def of the uint8_t typedef. This causes compile failures when
bringing in the new yocto.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Icba3941083bd891839c7d76f7466bfcebf07a6fa
diff --git a/include/ipmid-host/cmd-utils.hpp b/include/ipmid-host/cmd-utils.hpp
index e7c6dc2..6646f03 100644
--- a/include/ipmid-host/cmd-utils.hpp
+++ b/include/ipmid-host/cmd-utils.hpp
@@ -2,6 +2,7 @@
 
 #include <unistd.h>
 
+#include <cstdint>
 #include <functional>
 #include <tuple>