Update .gitignore

[feliperodri]

Adding the following files to the list:
src/ansi-c/gcc_builtin_headers_ia32-5.inc
src/cprover/cprover
src/crangler/c_lex.yy.cpp
src/crangler/crangler

Signed-off-by: Felipe R. Monteiro felisous@amazon.com

• Each commit message has a non-empty body, explaining why the change was made.
• Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• 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).
• My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Base: 77.82% // Head: 77.82% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (5e2ff66) compared to base (3108086).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7182      +/-   ##
===========================================
- Coverage    77.82%   77.82%   -0.01%     
===========================================
  Files         1578     1578              
  Lines       182209   182242      +33     
===========================================
+ Hits        141805   141824      +19     
- Misses       40404    40418      +14     

Impacted Files	Coverage Δ
src/goto-instrument/dump_c.cpp	80.00% <0.00%> (-0.87%)	⬇️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.