Add discussion of processing frameworks being responsible for #892

Job	Run time
Build the vulkan specification and generate any associated files (such as vulkan.h)	6m 10s
Run Vulkan CTS framework tests to validate against XML changes	1m 47s
Verify repository license compliance	38s
Build the core-only spec, to try and catch ifdef errors in extension markup	54s
Build a test spec and check against expectation, to make sure the spec toolchain works as expected	1m 18s
Run various checker scripts on the spec and XML sources	44s
Generate the vulkan C++ header (vulkan.hpp)	1m 7s
Generate Rust bindings (Ash crate)	29s
Compile a simple test program that uses vulkan.h	8s
Compile a simple test program that uses vulkan.hpp	23s
Build-test Rust bindings (Ash crate)	3s
	13m 41s

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