Update configfile.cpp

Fix of a mistake, making it impossible to use config file in current dir.
Merge pull request #589 from yglukhov/patch-1

Update configfile.cpp
Travis: Install gcc 4.8 and clang 3.4.

This is required for LLVM 3.5.
Merge branch 'master' into merge-2.064
Add predefined version identifier for float ABI.
Dump all predefined version identifiers if logger is enabled.
Merge branch 'merge-2.064' into merge-2.065