i386/loader: Call tslog_init

This allows the i386 loader to start recording timestamps.

Reviewed by:	kevans

stand/i386/loader/main.c

@@ -130,6 +130,12 @@ main(void)
 	}
 	setheap(heap_bottom, heap_top);
 
+	/*
+	 * Now that malloc is usable, allocate a buffer for tslog and start
+	 * logging timestamps during the boot process.
+	 */
+	tslog_init();
+
 	/*
 	 * detect ACPI for future reference. This may set console to comconsole
 	 * if we do have ACPI SPCR table.