mesa-libs and llvm

[rank1seeker at gmail.com]

On REL 11.1 i386, I've been upgrading 'mesa-libs-17.2.2' to 'mesa-libs-17.2.3'
Bassed on fact that mesa-libs-17.2.3 depends on package: llvm40>=3.9.0_4
Why does it pulls devel/llvm40 (4.0.1) when base has 4.0.0 as even 3.9.0 would be enough?