[wasm] [codestyle] Fix pointer alignment in wasm-debug.cc

Our .clang-format is derived on the Google style, which sets
PointerAlignment to left (e.g. "Type* name"), but sets
DerivePointerAlignment to true. Once we started with the wrong style,
this made all new code in wasm-debug.cc use PointerAlignment=right,
resulting in lots of code using the wrong style.

For this CL, I ran
clang-format -style="{DerivePointerAlignment: false, BasedOnStyle: \
  Google}" -i src/wasm/wasm-debug.cc

R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2635003002
Cr-Commit-Position: refs/heads/master@{#42380}