Add goto-cc man page

[tautschnig]

This was built using help2man and then manually expanded. Also fixes
that goto-cc --export-file-local-symbols was never documented in its
--help output.

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Merging #6945 (a6f1474) into develop (897034a) will increase coverage by 0.00%.
The diff coverage is 83.83%.

@@           Coverage Diff            @@
##           develop    #6945   +/-   ##
========================================
  Coverage    77.83%   77.83%           
========================================
  Files         1568     1569    +1     
  Lines       180365   180429   +64     
========================================
+ Hits        140382   140432   +50     
- Misses       39983    39997   +14     

Impacted Files	Coverage Δ
src/goto-cc/goto_cc_mode.cpp	37.77% <ø> (ø)
...oto-instrument/contracts/instrument_spec_assigns.h	94.73% <ø> (ø)
src/goto-instrument/contracts/utils.h	100.00% <ø> (+16.07%)	⬆️
...c/solvers/smt2_incremental/convert_expr_to_smt.cpp	87.71% <0.00%> (-0.62%)	⬇️
src/solvers/smt2_incremental/smt_sorts.def	66.66% <0.00%> (-33.34%)	⬇️
src/util/config.h	57.14% <ø> (ø)
unit/solvers/smt2_incremental/smt_sorts.cpp	82.00% <76.47%> (-5.76%)	⬇️
src/goto-instrument/contracts/cfg_info.h	85.00% <85.00%> (ø)
...o-instrument/contracts/instrument_spec_assigns.cpp	99.35% <95.45%> (+0.76%)	⬆️
src/goto-instrument/contracts/contracts.cpp	94.10% <100.00%> (+<0.01%)	⬆️
... and 8 more

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[TGWDB]

One instance of "GOTO-CC" instead of correctly formatted.

[tautschnig]

One instance of "GOTO-CC" instead of correctly formatted.

If you're referring to line 28: I did this on purpose, because here I'm not referring the name of the Unix command, but the system as a whole. You comment, however, tells me that I'm not getting across this intention. Any ideas how I could do it instead?

[TGWDB]

One instance of "GOTO-CC" instead of correctly formatted.

If you're referring to line 28: I did this on purpose, because here I'm not referring the name of the Unix command, but the system as a whole. You comment, however, tells me that I'm not getting across this intention. Any ideas how I could do it instead?

Maybe something like "The invocation of a specific program can emulate ..." ?