[console] Do not share ANSI escape context between lineconsole users

An ANSI escape sequence context cannot be shared between multiple
users.  Make the ANSI escape sequence context part of the line console
definition and provide individual contexts for each user.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/interface/vmware/vmconsole.c

@@ -51,10 +51,18 @@ static struct {
 	.prefix = "log ",
 };
 
+/** VMware logfile console ANSI escape sequence handlers */
+static struct ansiesc_handler vmconsole_handlers[] = {
+	{ 0, NULL }
+};
+
 /** VMware logfile line console */
 static struct line_console vmconsole_line = {
 	.buffer = vmconsole_buffer.message,
 	.len = sizeof ( vmconsole_buffer.message ),
+	.ctx = {
+		.handlers = vmconsole_handlers,
+	},
 };
 
 /** VMware logfile console recursion marker */