RFR: 8235151: Inexistent notifyQuit method referred from iOS GlassHelper.m

[Jose Pereda]

`GlassHelper.m` for iOS contains the public method `ApplicationNotifyQuitMethod()`, that tries to find via reflection the `notifyQuit()` method in the `com.sun.glass.ui.Application` class. 

But the method `notifyQuit` doesn't exist in that class. However `notifyWillQuit` exists, and it is used in the Mac platform, for instance, when `ApplicationNotifyWillQuitMethod()` is called.

This PR renames `notifyQuit` to `notifyWillQuit`, and therefore `ApplicationNotifyQuitMethod` is also renamed to `ApplicationNotifyWillQuitMethod`.

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Commits:
 - 0fe426ab: Rename notifyQuit and ApplicationNotifyQuitMethod to notifyWillQuit and ApplicationNotifyWillQuitMethod

Changes: https://git.openjdk.java.net/jfx/pull/58/files
 Webrev: https://webrevs.openjdk.java.net/jfx/58/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8235151
  Stats: 9 lines in 3 files changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.java.net/jfx/pull/58.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/58/head:pull/58

PR: https://git.openjdk.java.net/jfx/pull/58