[spritekit] Update for Xcode 8.3 beta 1 - part 2

[VincentDondain]

This is part 2 of #1628:
"[spritekit] Update for iOS 10.3 beta 1"

Thanks Tim for spotting these issues.

[monojenkins]

Build failure

[spouliot]

build

[monojenkins]

Build failure

[spouliot]

This only covers part of

!missing-selector! SKEffectNode::attributeValues not bound
!missing-selector! SKEffectNode::setAttributeValues: not bound
!missing-selector! SKEffectNode::setValue:forAttributeNamed: not bound
!missing-selector! SKEffectNode::valueForAttributeNamed: not bound
!missing-selector! SKEmitterNode::attributeValues not bound
!missing-selector! SKEmitterNode::setAttributeValues: not bound
!missing-selector! SKEmitterNode::setValue:forAttributeNamed: not bound
!missing-selector! SKEmitterNode::valueForAttributeNamed: not bound
!missing-selector! SKShapeNode::attributeValues not bound
!missing-selector! SKShapeNode::setAttributeValues: not bound
!missing-selector! SKShapeNode::setValue:forAttributeNamed: not bound
!missing-selector! SKShapeNode::valueForAttributeNamed: not bound
!missing-selector! SKSpriteNode::attributeValues not bound
!missing-selector! SKSpriteNode::setAttributeValues: not bound
!missing-selector! SKSpriteNode::setValue:forAttributeNamed: not bound
!missing-selector! SKSpriteNode::valueForAttributeNamed: not bound
!missing-selector! SKTileMapNode::attributeValues not bound
!missing-selector! SKTileMapNode::setAttributeValues: not bound
!missing-selector! SKTileMapNode::setValue:forAttributeNamed: not bound
!missing-selector! SKTileMapNode::valueForAttributeNamed: not bound

Double-check the documentation but it seems that exposing the *:: attributeValues properties covers all cases. If that's the case then please update common.ignore for the rest. thanks!

[spouliot]

update xtro :)

[VincentDondain]

#1694 (comment) – all gone.

I think we should expose *::setValue:forAttributeNamed: and *::valueForAttributeNamed:, see commit message.

[monojenkins]

Build failure

[VincentDondain]

Unrelated test failures:
iOS Unified 32 bit - https://bugzilla.xamarin.com/show_bug.cgi?id=52162