These projects were tested and it was found that their use
of MSAN does not work on Ubuntu 20.04. Therefore their use of
MSAN is being disabled.
Related: #6180
* [presubmit] Enforce language attribute in projectt.yaml to be always set.
* Update documentation, better presubmit check, new project template.
* add docstring to templates.py
* Add example values in the project.yaml template and remove python value for now
* Add "project: c++" to 256 projects
* format
* Add labels and selective_unpack sections to the presubmit check
* fix incorrect auto_ccs format in three projects
* fix nss emails after rebase
A direct clone now gives you dev which is future Qt 6, none of the
code using Qt expects Qt6 yet
Using 5.15 now (instead 5.12 before) means we have to disable
sanitize=vptr in parts of qt in kimageformats since those
parts now compile with no-rtti
While at it make the compilation script a bit better:
* Don't need to disable compressing rcc files, only needed to pass
the CFLAGS to the QMAKE_CFLAGS
* Also fix the "make qmake faster" sed command
jonathanmetzman