D11941: Make it possible for KTextEditor to build on Android NDK's gcc 4.9

[Aleix Pol Gonzalez]

apol created this revision.
apol added a reviewer: Frameworks.
Restricted Application added projects: Kate, Frameworks.
apol requested review of this revision.

REVISION SUMMARY
  log2 and std::rename aren't available there.

REPOSITORY
  R39 KTextEditor

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D11941

AFFECTED FILES
  src/buffer/katesecuretextbuffer.cpp
  src/document/katedocument.cpp

To: apol, #frameworks
Cc: michaelh, kevinapavew, ngraham, demsking, cullmann, sars, dhaumann
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