The Micro XRCE-DDS Client custom-transport API expects user
callbacks with prototypes of the form
bool open_cb (struct uxrCustomTransport *transport);
size_t read_cb(struct uxrCustomTransport *transport, ...);
The struct tag is fixed by the upstream public header
<uxr/client/profile/transport/custom/custom_transport.h> and
cannot be renamed. nxstyle currently flags every callback
signature in apps/system/microros/transport with 'Mixed case
identifier found'.
Add the 'uxrCustom' prefix to g_white_prefix, following the same
pattern used for the ROS 2 message type names added in
commit bc3a2596c8 ("tools/nxstyle: Whitelist ROS 2 message type
identifiers.").
Signed-off-by: Arjav Patel <arjav1528@gmail.com>