[roll pigweed] pw_rpc: Fix for test_method_context.h with XT-Clang

XT-Clang 14.07 refuses to compile this header unless the `span(buffer)`
is split to a local declaration.

Tested: `pw presubmit`
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/105560

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 61dbb62d077c19f..b4be8f60ce6754c
Roller-URL: https://ci.chromium.org/b/8806196434432545345
Cq-Cl-Tag: roller-builder:pigweed-zephyr-roller
Cq-Cl-Tag: roller-bid:8806196434432545345
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Change-Id: I51c4687e6e3899e22dfe2153611f6c086f28e34b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/105861
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
1 file changed
tree: 47eb14bbee62c6e20afaa934218a9f46a342046e
  1. .gitmodules
  2. test.sh