Breaks the build on GCC:<div><br></div><div><div>> Building CXX object language/CMakeFiles/kdevplatformlanguage.dir/backgroundparser/backgroundparser.o                                                                                                                                          </div>
<div>> In file included from /usr/lib64/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../include/c++/4.6.3/unordered_map:35:0,                                                                                                                              </div>
<div>>                  from /home/jurily/projects/extern/kdevplatform/language/editor/modificationrevision.cpp:31:</div><div>> /usr/lib64/gcc/x86_64-pc-linux-gnu/4.6.3/../../../../include/c++/4.6.3/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.</div>
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