Fix "implicit declaration" of functions

[adrpo]

It seems that the .h file we include doesn't contain some functions used.

The problem is that they end up being defined implicitly which means "int func" instead of "ptr_size func" which might cause problems.

See for example:
​https://test.openmodelica.org/hudson/job/OpenModelica_BUILD_CLANG/lastBuild/consoleFull

IDA-LIU050+adrpo@ida-liu050 MINGW64 /f
$ fgrep "implicit declaration of" consoleText.txt
build/StateMachineFeatures.c:550:8: warning: implicit declaration of function 'boxptr_ExpressionDump_dumpExpStr' is invalid in C99 [-Wimplicit-function-declaration]
build/Patternm.c:8480:10: warning: implicit declaration of function 'omc_Ceval_ceval' is invalid in C99 [-Wimplicit-function-declaration]
build/Patternm.c:8481:12: warning: implicit declaration of function 'omc_ValuesUtil_valueExp' is invalid in C99 [-Wimplicit-function-declaration]
/run/shm/OpenModelica_BUILD_CLANG/OpenModelica-clang/OMCompiler/Compiler/boot/build/tmp/StateMachineFeatures.c:579:10: warning: implicit declaration of function 'boxptr_ExpressionDump_dumpExpStr' is invalid in C99 [-Wimplicit-function-declaration]

[adrpo]

This only happens for the code inside bootstrap-sources.tar.xz, not the generated code with the built compiler. Maybe we should update bootstrap-sources.tar.xz to the latest?

[dietmarw]

Sorting away the closed as invalid, won't fix and duplicate tickets from Future.