Update to out of source makefile build and add run-cbmc-proofs.py
CBMC proofs can now be run with Litani with the command
"./run-cbmc-proofs.py"
Based on commits:
* 1646301 - Ignore CBMC proof failures, fail the build later (4 months ago) <Kareem Khazem>
* 7e8c91a - Fix Makefile prerequisite symbol for CBMC proofs (4 months ago) <Kareem Khazem>
* bee04be - Enable CBMC proofs to run in CI (4 months ago) <Kareem Khazem>
Found in https://github.com/FreeRTOS/FreeRTOS-Plus-TCP
* Exclude FreeRTOS/Demo from CBMC proof reports.
The script cbmc-viewer generates the CBMC proof reports. The script
searches source files for symbol definitions and annotates source
files with coverage information. This patch causes cbmc-viewer to
ignore the directory FreeRTOS/Demo containing 348M of data. The
script now terminates in a few seconds.
* Make report default target for CBMC Makefile.
Modify the Makefile for CBMC proofs to generate the report by default
(and not just property checking) and modify property checking to
ignore failures (due to property assertions failing) and terminating
report generation.
Co-authored-by: Mark R. Tuttle <mrtuttle@amazon.com>
