Previously, the LibWeb bindings generator would output multiple per
interface files like Prototype/Constructor/Namespace/GlobalMixin
depending on the contents of that IDL file.
This complicates the build system as it means that it does not know
what files will be generated without knowledge of the contents of that
IDL file.
Instead, for each IDL file only generate a single Bindings/<IDLFile>.h
and Bindings/<IDLFile>.cpp.
This implements enough of the Geolocation spec that it is now possible
for websites to retrieve the current geo position or try to watch for
updates (which currently never happen).
As it stands now, it only returns a single emulated position that points
to San Francisco.
