Causing:
"==19==ERROR: AddressSanitizer: attempting free on address which was not malloc()-ed" everywhere
Revert "[infra] disabling unused command line argument error"
This reverts commit 4332b19a9f.
Revert "[infra] using lld. Fixes#295. (#297)"
This reverts commit 446a6a7534.
Each RUN command creates an overlay layer. This results in keeeping all
intermediate files.
By consolidating all work in a single script, the size of base-clang
image is decreased from 3G to 1G.