Compile errors on msvc2008 relating to std::lower_bound

In MSVC2008, debug mode enables several extra checks in the STL, such as checking that the range passed to std::lower_bound is actually sorted. The following code would usually only need operator<(Foo,Bar), but in VC2008 debug mode it also requires operator<(Bar,Foo) and operator<(Foo,Foo):

SomeContainer<Foo> v;
Bar x;
std::lower_bound(begin(v), end(v), x);

In 23d7f6ee, qBinaryFind was changed to use std::lower_bound instead of qLowerBound. This broke the build in several places, for example this error in tools/qregexp.cpp:3248:

error C2678: binary '<' : no operator found which takes a left-hand operand of type 'const CategoriesRangeMapEntry' (or there is no acceptable conversion) while trying to match the argument list '(const CategoriesRangeMapEntry, const CategoriesRangeMapEntry)'

where only operator<(CategoriesRangeMapEntry, const char*) and operator<(const char*, CategoriesRangeMapEntry) are defined.

None of this happens when compiling in release mode.

Very related bug: QTBUG-27419