examples: linux: Close file on error in bind_rpmsg_chrdev

The file should be closed when returning from this function in the error
path. Fix this here.

Signed-off-by: Andrew Davis <afd@ti.com>

examples/linux/common/common.c

@@ -84,6 +84,7 @@ int bind_rpmsg_chrdev(const char *rpmsg_dev_name)
 	if (ret < 0) {
 		fprintf(stderr, "Failed to write %s to %s, %s\n",
 			rpmsg_chdrv, fpath, strerror(errno));
+		close(fd);
 		return -EINVAL;
 	}
 	close(fd);
@@ -101,6 +102,7 @@ int bind_rpmsg_chrdev(const char *rpmsg_dev_name)
 	if (ret < 0) {
 		fprintf(stderr, "Failed to write %s to %s, %s\n",
 			rpmsg_dev_name, fpath, strerror(errno));
+		close(fd);
 		return -EINVAL;
 	}
 	close(fd);