devel/spirv-llvm-translator: update to 21.1.5/20.1.11/19.1.16/18.1.21/16.0.22/1[4-7].0.21

Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v13.0.5
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v14.0.21
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v15.0.21
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v16.0.22
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v17.0.21
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v18.1.21
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v19.1.16
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v20.1.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v21.1.5
Reported by: GitHub (watch releases)