devel/spirv-llvm-translator: update to 20.1.1/19.1.6/18.1.11/1[4-7].0.11/1[13].0.2

Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v11.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v13.0.2
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v14.0.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v15.0.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v16.0.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v17.0.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v18.1.11
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v19.1.6
Changes: https://github.com/KhronosGroup/SPIRV-LLVM-Translator/releases/tag/v20.1.1
Reported by: GitHub (watch releases)