Update LICENSE file for the new host software of multi_webcamera

LICENSE

@@ -1744,3 +1744,55 @@ Download:
 https://github.com/kmackay/micro-ecc.git
 
 ========================================================================
+
+20. License of multi_webcamera host
+
+========================================================================
+examples/multi_webcamera/host/linux_video
+
+This software is used on linux and distributed subject to the licensing
+described in the following file:
+
+  examples/multi_webcamera/host/linux_video/LICENSE
+
+
+examples/multi_webcamera/host/python
+
+This script is used on linux and distributed subject to the following
+licensing descriiption:
+
+BSD-3-Clause
+------------------------------------------------------------------------
+  Copyright 2019, 2020 Sony Semiconductor Solutions Corporation
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+3. Neither the name of Sony Semiconductor Solutions Corporation nor
+   the names of its contributors may be used to endorse or promote
+   products derived from this software without specific prior written
+   permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+------------------------------------------------------------------------
+
+========================================================================
+