RFR: 8235150: IosApplication does not pass the required object in _leaveNestedEventLoopImpl

[Jose Pereda]

In `GlassApplication.m` for iOS, the method
`Java_com_sun_glass_ui_ios_IosApplication__1leaveNestedEventLoopImpl` has signature `(Ljava/lang/Object;)V`, however in `IosApplication.java`, `_leaveNestedEventLoopImpl()` signature doesn't match that.

This PR fixes this.

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Commits:
 - e5fc04a9: Use correct signature in _leaveNestedEventLoopImpl

Changes: https://git.openjdk.java.net/jfx/pull/57/files
 Webrev: https://webrevs.openjdk.java.net/jfx/57/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8235150
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jfx/pull/57.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/57/head:pull/57

PR: https://git.openjdk.java.net/jfx/pull/57