Add discussion of processing frameworks being responsible for all def… #894

Job	Run time
Build the vulkan specification and generate any associated files (such as vulkan.h)	5m 54s
Run Vulkan CTS framework tests to validate against XML changes	1m 43s
Build the core-only spec, to try and catch ifdef errors in extension markup	49s
Verify repository license compliance	39s
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	50s
Generate Rust bindings (Ash crate)	44s
Generate the vulkan C++ header (vulkan.hpp)	1m 0s
Compile a simple test program that uses vulkan.h	13s
Build-test Rust bindings (Ash crate)	1m 2s
Compile a simple test program that uses vulkan.hpp	30s
	14m 42s

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