[spirv] Update SPIRV-Tools and SPIRV-Headers. (#3296)

Picks up more KHR ray tracing changes.
2020-12-03 11:43:58 -06:00 · 2020-12-03 11:43:58 -06:00 · f28bb1ae4e
--- a/external/SPIRV-Headers
+++ b/external/SPIRV-Headers
@ -1 +1 @@
-Subproject commit 104ecc356c1bea4476320faca64440cd1df655a3
+Subproject commit f027d53ded7e230e008d37c8b47ede7cd308e19d
--- a/external/SPIRV-Tools
+++ b/external/SPIRV-Tools
@ -1 +1 @@
-Subproject commit cd590fa3341284cd6d1ee82366155786cfd44c96
+Subproject commit 21f7c5675da3a45c13024dc1169438eb4e8f7e0c
		`@ -1 +1 @@`
			`Subproject commit 104ecc356c1bea4476320faca64440cd1df655a3`				`Subproject commit f027d53ded7e230e008d37c8b47ede7cd308e19d`
		`@ -1 +1 @@`
			`Subproject commit cd590fa3341284cd6d1ee82366155786cfd44c96`				`Subproject commit 21f7c5675da3a45c13024dc1169438eb4e8f7e0c`