ppc64le custom presets.

[asowani]

Contains custom build presets for ppc64le.

[asowani]

The build presets contained in this PR are required for building 4.2-branch on ppc64le CI. Can those be cherry-picked? Relevant discussion is at #16884

[airspeedswift]

Hi @asowani – sorry for the confusion. Let's get this PR reviewed, tested and landed on master (looks like some conflicts need resolving). Once that's done we can talk about whether it should be taken into the 4.2 branch, but please hold off on raising 4.2 PRs until after things are merged to master in general.

[asowani]

I have modified test/IRGen/clang_iniline_opt.swift to resolve the conflict. "-enable-objc-interop" got added to master after my PR, hence the conflict. Is it possible to merge this PR now? Thanks!

[shahmishal]

@asowani can you resolve the conflict?

<<<<<<< master
// UNSUPPORTED: CPU=powerpc64le
=======
>>>>>>> master

[shahmishal]

@swift-ci test

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - 086837e

[swift-ci]

Build failed
Swift Test OS X Platform
Git Sha - 086837e

[CodaFi]

Rebased this. Going to merge it in #28328