Change-Id: Id107b6c1f34f594c5a01502c156963c964235ed7
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ib61197da939165d24b99e40f29f9de13d109e044
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

Resetting the environment (after each *.cpp file) did not clear the
already seen files (m_included). Because of that the succeeding header
files were not parsed correctly - the environments of the mistakenly
already seen header files were not merged in.

Note that this change slow downs the parsing/indexing of files to its
original speed, as it was before the problematic commit (and it is in
2.7):

    commit 82e34709
    C++: Untangle include file resolving from loading.

Task-number: QTCREATORBUG-9205
Change-Id: Iea57b7c59ea04a3c8843fd1291f4c375382958fc
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I399d667a1fccb376fadbd6ab8fbba243e86d8f4b
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>