Gitignore for portfolio about gazer

[AdamZsofi]

I saw that 0 before a few times, but I thought it disappeared with another small fix.
Can you share the command (or one of the commands) used?
I'll try to reproduce the problem and take a look at it.

[radl97]

I just ran make check-functional and then it showed up in git status.
Working in master branch, even tested with GAZER_TOOLS_DIR=$PWD/build/tools/ lit test/portfolio/.

Note: The test fails for me, probably because LLVM9 was not properly installed, maybe that triggers the bug.

EDIT: grammar

[AdamZsofi]

There was a typo, when creating the logfile (I tried blaming perl-tidy for it, but I couldn't reproduce the thing, so it was probably my fault), which instead of concatenating the filename, tried to divide two strings, but instead of dying it returned 0.

Patched it on the branch portfolio-patch, but there is a good chance, that I'll need to patch a few other things in the coming days, so I'll merge and close this afterwards.