opencollada: uninitialized bool variable broke the parsing

GeneratedSaxParser::Utils:toURI() method has a bool output
parameter called failed, which is assumed to be set inside
the method before return. At some place the caller code does
not initialize the bool variable passed to this failed parameter
and so when the caller checkes the returned value it is
undefined.
e.g. it can be false when the method called successfully so
the error handling throws away the returned URI.

Change-Id: I3f90fab657a86b42bba0f492518e36c343e69d21
opencollada: move patches to an own folder

Change-Id: I0b60fa5b0af8224b4c517367130aa9738f071531
collada2gltf: fix URL problems

collada2gltf does not handle Windows pathes, the used COLLADABU::URI
class can't parse native Windows pathes so call COLLADA2GLTFWriter
with URL only.
Other problems:
collada2gltf uses the URL path for creating/opening files,
instead of native ones.
collada2gltf initializes _outputFilePath member in different way,
sometimes as an URL path, sometimes as a native one, but handle it
on the same way(as an URL).

Change-Id: I104182653c07e7dcf6fc5b6e32c7031d59246b84
collada2gltf: move patches to an own folder

Change-Id: Ife28845af92883d8090bb80283c59a0a9a350b32