Merge branch 'low_bit_support' into 'dev'

Low bit support

See merge request eclipse/aidge/aidge_export_arm_cortexm!16

aidge_export_arm_cortexm/boards/stm32/F7/Drivers/CMSIS/Device/ST/STM32F7xx/LICENSE.txt

+This software component is provided to you as part of a software package and
+applicable license terms are in the  Package_license file. If you received this
+software component outside of a package or without applicable license terms,
+the terms of the Apache-2.0 license shall apply. 
+You may obtain a copy of the Apache-2.0 at:
+https://opensource.org/licenses/Apache-2.0

aidge_export_arm_cortexm/boards/stm32/F7/Drivers/CMSIS/Include/cmsis_version.h

+/**************************************************************************//**
+ * @file     cmsis_version.h
+ * @brief    CMSIS Core(M) Version definitions
+ * @version  V5.0.2
+ * @date     19. April 2017
+ ******************************************************************************/
+/*
+ * Copyright (c) 2009-2017 ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if   defined ( __ICCARM__ )
+  #pragma system_include         /* treat file as system include file for MISRA check */
+#elif defined (__clang__)
+  #pragma clang system_header   /* treat file as system include file */
+#endif
+
+#ifndef __CMSIS_VERSION_H
+#define __CMSIS_VERSION_H
+
+/*  CMSIS Version definitions */
+#define __CM_CMSIS_VERSION_MAIN  ( 5U)                                      /*!< [31:16] CMSIS Core(M) main version */
+#define __CM_CMSIS_VERSION_SUB   ( 1U)                                      /*!< [15:0]  CMSIS Core(M) sub version */
+#define __CM_CMSIS_VERSION       ((__CM_CMSIS_VERSION_MAIN << 16U) | \
+                                   __CM_CMSIS_VERSION_SUB           )       /*!< CMSIS Core(M) version number */
+#endif