Bump external/SPIRV-Tools from 08d8fae to 5ed21eb (#67)

* Bump external/SPIRV-Tools from `08d8fae` to `5ed21eb`

Bumps [external/SPIRV-Tools](https://github.com/KhronosGroup/SPIRV-Tools) from `08d8fae` to `5ed21eb`.
- [Release notes](https://github.com/KhronosGroup/SPIRV-Tools/releases)
- [Commits](KhronosGroup/SPIRV-Tools@08d8fae...5ed21eb)

---
updated-dependencies:
- dependency-name: external/SPIRV-Tools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix build

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Kévin Petit <kpet@free.fr>

CMakeLists.txt

@@ -45,6 +45,7 @@ else()
 endif()
 
 # Add SPIRV-Tools
+set(SPIRV_SKIP_TESTS ON)
 set(SPIRV-Headers_SOURCE_DIR ${PROJECT_SOURCE_DIR}/external/SPIRV-Headers)
 set(SPIRV_TOOLS_DIR ${PROJECT_SOURCE_DIR}/external/SPIRV-Tools)
 set(SPIRV_TOOLS_BINARY_DIR ${CMAKE_BINARY_DIR}/external/SPIRV-Tools)