Upgrade CBMC proof tools: starter kit and Litani 1.10.0 (#722)

* Upgrade proof tool submodules

This commit advances Litani to release 1.10.0, and the starter kit to
the tip-of-tree. This brings the following improvements:

- Profiling
    - Litani measures the memory usage of the CBMC safety checking and
      coverage checking jobs
    - The dashboard includes box-and-whisker diagrams for memory use per
      proof
    - The dashboard includes a graph of how many parallel jobs are
      running over the whole run, making it easy to choose a CI machine
      with enough parallelism
    - It is now possible to designate particular proofs as "EXPENSIVE";
      Litani runs expensive proofs serially, ensuring that they do not
      over-consume resources like RAM.

- UI improvements
    - Each pipeline page includes a table of contents
    - Each pipeline page includes a dependency graph of the pipeline
    - Each job on the pipeline page has a hyperlink to that job
    - The terminal output is now less noisy

* Change cbmc-batch.yaml to cbmc-proof.txt

This makes the proof layout consistent with the starter kit, which will
allow us to use a generic run script in a future commit. Putting this
in commit by itself because the diff is huge and not worth reading (just
moving some files and changing two lines in the runscript).

* Symlink run-cbmc-proofs.py to starter kit

The run script is now a symbolic link into the starter kit submodule,
meaning that it will be updated whenever the starter kit is. This is
done iso that E-SDK doesn't carry custom modifications to the run script
unless necessary; previous commits have made the E-SDK proofs consistent
with the generic starter kit conventions.

Author: karkhaz

verification/cbmc/.gitignore

@@ -3,6 +3,7 @@ proofs/**/logs
 proofs/**/gotos
 proofs/**/report
 proofs/**/html
+proofs/output
 
 # Emitted by CBMC Viewer
 TAGS-*

verification/cbmc/jobs_dontrun/aws_cryptosdk_hdr_clean_up/cbmc-batch.yaml

@@ -0,0 +1 @@
+This file marks the directory as containing a CBMC proof

verification/cbmc/jobs_dontrun/aws_cryptosdk_hdr_clean_up/cbmc-proof.txt

@@ -0,0 +1 @@
+This file marks the directory as containing a CBMC proof

verification/cbmc/jobs_dontrun/aws_cryptosdk_hdr_size/cbmc-batch.yaml

@@ -0,0 +1 @@
+This file marks the directory as containing a CBMC proof

verification/cbmc/jobs_dontrun/aws_cryptosdk_hdr_size/cbmc-proof.txt

@@ -0,0 +1 @@
+This file marks the directory as containing a CBMC proof