Add IndentCaseBlocks to .clang-format
Add IndentCaseBlocks to .clang-format

This option is supported since clang-format version 11. Just use the
default value for now, to not change the formatting but ensure we have
a compatible version of the tool available where required.

Bug: b/144825072
Change-Id: If5787f7a8f3502bae5c16e561599f87f4b90f6d6
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50528
Presubmit-Ready: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Kokoro-Result: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Tested-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Reviewed-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>

bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader