Misleading indentation fixes (GCC6)

These all look innocent enough, but why not to fix them.

Some analysis:

qmljsinterpreter.cpp: Just wrong indentation

makefileresolver.cpp workingDirectory: Looks like this path is never
executed (we call this function only with absolute path)

makefileresolver.cpp res.paths: This one is probably a real issue - it uses
cachedDefines every time instead of only when res.paths.isEmpty().

Differential Revision: D1266