When using a camera with depth only clearing and MSAA iOS build spams constantly this error: Metal: Can't set kSurfaceUseResolvedBuffer surface flag after it has been set as an encoder attachment if MTLStoreActionStoreAndMultisampleResolve is unsupported
Disabling MSAA, changing graphics API or changing camera's clearing solves this issue.

To reproduce:
1. Build attached project for iOS
2. Run it on the device
3. Inspect Xcode console

Expected result: There shouldn't be any errors in the console
Actual result: Errors spam constantly

Reproduced with: Unity 2017.1.2p3, 2017.2.0p2, 2018.3.0b8, 2018.1.0a6
Not reproducible with: Unity 2017.1.2p2, 2017.2.0p1, 2017.3.0b7
Device: iPhone 5s iOS 9.3.3

Not reproducible with: iPhone 8+ iOS 11.0.1

Fixed in: 2018.2.0a1
Backported to: 2018.1.0b4, 2017.3.0p2, 5.6.5p1, 2017.2.1p3, 2017.1.3p1