Fix NoSuchMethodError in Gradle 2.8

[brunobowden]

• Gradle 2.8 build fixes (currently still built with Gradle 2.4)
• Skip @CompileStatic for testing j2objcConfig behaviour

Fixes #566

[brunobowden]

cc @eapache

[eapache]

LGTM, thanks! I'd forgotten how weird groovy can be :P

[brunobowden]

Merging based on successful build on Appveyor before. Not sure why the Appveyor CI isn't responding now.
https://ci.appveyor.com/project/madvayApiAccess/j2objc-gradle

[brunobowden]

The Appveyor CI did build successfully but wasn't showing the updates correctly:
https://ci.appveyor.com/project/madvayApiAccess/j2objc-gradle/build/build86.master-hexycvbk

[advayDev1]

lgtm

[tirrorex]

Hi guys, currently using id 'com.github.j2objccontrib.j2objcgradle' version '0.5.0-alpha'
How do we do to get this specific commit? Because i got the error refered by the issue #566
As i am the ios intern i have no clue and there is no indication to build the plugin from source to get latest modifications without release, thanks

[brunobowden]

@tirrorex - aside from building the plugin, the easiest workaround is to switch to an older version of Gradle, e.g. version 2.4. Otherwise, you'll need to wait until a new version of the plugin is release, which isn't planned at the moment.

[tirrorex]

@brunobowden it is not possible for me to switch to a previous version, i did the upgrade because they did it on the android project so i have no choice actually, i wanted to build the plugin from source but there is no information on how to do it (and i didn't see any makefile so i'm kinda lost here).
Any chance to get a little tutorial?

[brunobowden]

@tirrorex - v0.6.0 has now been published with this fix for Gradle 2.8. Please try it out and confirm whether it works or not for you.

Please note that we have another issue with Gradle 2.9 that's more difficult to solve, so you may be stuck on Gradle 2.8 for a while.