Log message:
Pullup ticket #6486 - requested by he
lang/rust: build fix

Revisions pulled up:
- lang/rust/Makefile                                            1.242
- lang/rust/options.mk                                          1.15

---
   Module Name:	pkgsrc
   Committed By:	he
   Date:		Sun Jul 11 22:13:38 UTC 2021

   Modified Files:
   	pkgsrc/lang/rust: Makefile options.mk

   Log message:
   Evidently, cmake is needed in all cases.

   Move cmake dependency out of condition on PKG_OPTIONS.rust-llvm.