Add VeriFast kernel queue proofs (#117)

FreeRTOS/Test/VeriFast/scripts/generate_diff_files.sh

@@ -0,0 +1,47 @@
+#!/bin/bash -eu
+
+FUNCS=(
+  prvCopyDataFromQueue
+  prvCopyDataToQueue
+  prvInitialiseNewQueue
+  prvIsQueueEmpty
+  prvIsQueueFull
+  prvUnlockQueue
+  uxQueueMessagesWaiting
+  uxQueueSpacesAvailable
+  vQueueDelete
+  xQueueGenericCreate
+  xQueueGenericReset
+  xQueueGenericSend
+  xQueueGenericSendFromISR
+  xQueueIsQueueEmptyFromISR
+  xQueueIsQueueFullFromISR
+  xQueuePeek
+  xQueuePeekFromISR
+  xQueueReceive
+  xQueueReceiveFromISR
+)
+
+if [ ! -d "FreeRTOS-Kernel" ]; then
+    git clone https://github.com/FreeRTOS/FreeRTOS-Kernel.git
+fi
+pushd FreeRTOS-Kernel > /dev/null
+rm -rf tags generated
+ctags --excmd=number queue.c
+mkdir generated
+for f in ${FUNCS[@]}; do
+  ../extract.py tags $f > generated/$f.c
+done
+popd > /dev/null
+echo "created: FreeRTOS-Kernel/generated"
+
+ln -fs ../queue .
+pushd queue > /dev/null
+rm -rf tags generated
+ctags --excmd=number *.c
+mkdir generated
+for f in ${FUNCS[@]}; do
+  ../scripts/extract.py tags $f > generated/$f.c
+done
+popd > /dev/null
+echo "created: queue/generated"