* Always compile with -ldl when building for CODE_COVERAGE
When building with CODE_COVERAGE, the afl runtime contains code that
calls `dladdr` which requires -ldl. Under most circumstances, clang
already adds this (e.g. when building with pc-table), but there are some
circumstances where it isn't added automatically.
* Add visibility declaration to __afl_connected
When building with hidden visibility, the use of __AFL_LOOP inside such
code can cause linker errors due to __afl_connected being declared
"hidden".
* Update docs to clarify that CODE_COVERAGE=1 is required for dynamic_covfilter
Currently, if I build like with Clang, I'll get:
```bash
make LLVM_CONFIG=llvm-config-15 CC=clang-15 CXX=clang++-15
<snip>
[+] Everything seems to be working, ready to compile. (gcc version 12.1.0 (Ubuntu 12.1.0-2ubuntu1~22.04) )
clang-15 -O2 -D_FORTIFY_SOURCE=1 ....
```
Which is somewhat confusing. Fix this, and in a way that still outputs
the correct version info for Clang and GCC. Use `--version`, and pick
the first line, as that is where they are consistent in output. `clang
-v` gives the version first, whereas `gcc -v` gives the version on the
last line.
We switch to using $(CC), otherwise we also get incorrect output,
and dropping CCVER altogether, given this is it's only use.
* use concurrency
* run here too
* allow test failure
* only push on push
* fix coresight mode build
* support but disable coresight
* woops
* no unicorn for arm
* update codeql and fix makefile
* forgot those
* disable forward cache
* fix needing buildx
Co-authored-by: Ruben ten Hove <ruben.tenhove@tno.nl>
