Cppcheck-1.88

Cppcheck-1.88 has been released.

New checks:
* Comparing pointers that point to different objects
* Address of local variable 'x' is accessed at non-zero index
* STL usage: unnecessary search before insertion
* Duplicate expression for condition and assignment: if (x==3) x=3;

Added --library configuration files for:
* cppunit
* libcerror
* nspr
* opengl
* sqlite3

Better handling of C++14 and C++17

Command line:
* New command line option --addon used to run addons directly from Cppcheck.
* Some advanced options are only available in GUI:
- remove unused declarations in header files to speedup analysis
- remove unused templates to speedup analysis
- when checking visual studio project, only check 1 configuration
- max whole-program-analysis call stack depth
To get these features in command line tool, create a GUI project file and import that on command line using --project.

GUI:
* started implementing theme support

Makefile:
Please use MATCHCOMPILER=yes instead of SRCDIR=build when compiling to enable the match compiler.

Cert:
* add check exp15-c
* add check str03-c
* add check str05-c
* add check str07-c

Misra:
* Add check 17.7
* Add check 20.7
* Add check 20.10