BUILD: jwt: fix declaration of EVP_KEY in jwt-h.h

In file included from include/haproxy/jwt.h:25:
include/haproxy/jwt-t.h:66:2: error: unknown type name 'EVP_PKEY'
        EVP_PKEY *pkey;
        ^
1 error generated.

Fix this compilation issue by inserting openssl-compat.h in jwt-t.h
diff --git a/include/haproxy/jwt-t.h b/include/haproxy/jwt-t.h
index 3e7d577..a781b0a 100644
--- a/include/haproxy/jwt-t.h
+++ b/include/haproxy/jwt-t.h
@@ -22,6 +22,7 @@
 #ifndef _HAPROXY_JWT_T_H
 #define _HAPROXY_JWT_T_H
 
+#include <haproxy/openssl-compat.h>
 
 #ifdef USE_OPENSSL
 enum jwt_alg {