Roll SPIRV-Tools from fc8264854c53 to c2553a315f5c (5 revisions)

fc8264854c..c2553a315f

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/spirv-tools-angle-autoroll
Please CC timvp@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Bug: None
Tbr: timvp@google.com
Change-Id: If001c4eb01adfdc349719f9aab8bb77722a1d123
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2463245
Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -80,7 +80,7 @@ vars = {
   'spirv_headers_revision': '3fdabd0da2932c276b25b9b4a988ba134eba1aa6',
 
   # Current revision of SPIRV-Tools for Vulkan.
-  'spirv_tools_revision': 'fc8264854c5346da631a54831e9f34926987eff6',
+  'spirv_tools_revision': 'c2553a315f5c78d73a808526782596d4e3870082',
 
   # Current revision of Khronos Vulkan-Headers.
   'vulkan_headers_revision': '94ff600cc8623a2fd270cc14b14def3fca12ffaf',