juce_graphics lacks dependency on QuartzCore framework

[yairadix]

When building a application which depends on on juce_graphics, juce_events, and juce_core,
it fails linking in XCode 3 with:

Undefined symbols:
  ".objc_class_name_CIContext", referenced from:
      literal-pointer@__OBJC@__cls_refs@CIContext in juce_graphics.o

adding “QuartzCore” to modules/juce_graphics/juce_module_info’s “OSXFrameworks” field solves this.
cheers

[jules]

Thanks!