Add missing newline on eof

MacOS is choking on these:

/Users/gitlab/builds/libssh/libssh-mirror/src/packet_cb.c:508:2: error: no newline at end of file [-Werror,-Wnewline-eof]
}
 ^
1 error generated.

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Pavol Žáčik <pzacik@redhat.com>
Merge-Request: <https://gitlab.com/libssh/libssh-mirror/-/merge_requests/823>

src/packet_cb.c

@@ -505,4 +505,4 @@ SSH_PACKET_CALLBACK(ssh_packet_pong)
     session->pending_pings--;
 
     return SSH_PACKET_USED;
-}
+}

tests/client/torture_tinyssh.c

@@ -342,4 +342,4 @@ int torture_run_tests(void)
 
     ssh_finalize();
     return rc;
-}
+}

tests/pkd/pkd_keyutil.c

@@ -263,7 +263,7 @@ void cleanup_putty_client_keys(void)
 
     cleanup_key(PUTTY_ECDSA256_TESTKEY);
     cleanup_file(PUTTY_ECDSA256_PPK_TESTKEY);
-    
+
     cleanup_key(PUTTY_ED25519_TESTKEY);
     cleanup_file(PUTTY_ED25519_PPK_TESTKEY);
-}
+}

tests/pkd/pkd_util.h

@@ -14,4 +14,4 @@ int is_openssh_client_enabled(void);
 int is_dropbear_client_enabled(void);
 int is_putty_client_enabled(void);
 
-#endif /* __PKD_UTIL_H__ */
+#endif /* __PKD_UTIL_H__ */