LLVM_VERSION_MINOR is 0 in LLVM trunk now

[sanxiyn]

rustllvm includes some #if LLVM_VERSION_MINOR >= 8 checks which are intended as "LLVM 3.8 or later". Now LLVM SVN trunk is 4.0, LLVM_VERSION_MINOR is 0, and the check fails.

[shepmaster]

Oh, are you also working on supporting LLVM 4.x? We are doing it for the AVR fork.

[shepmaster]

Note that even with the version checks updated, the new LLVM code still fails (perhaps as should be expected). We've got some in-progress work and are tracking some of the work. I'd expect us to submit the non-AVR specific changes upstream, once they are working.

[sanxiyn]

Fixed by #36742.