code model requires normalized paths

(gcc) compiler output may contain non-normalized paths, like:

/home/tim/path/to/sources/./and/more.h:15:22: error: blub

clicking on the compiler output opens the correct header, but with the warning "this file is not part of any project" and therefore the code model is not available. however this is not entirely true, as the header is part of the project with its normalized path:

/home/tim/path/to/sources/and/more.h

after opening the non-normalized version of `more.h`, the locator contains two file entries: one for the normalized version, one with the `/./` in path