Skip protecting data memory on fuchsia

The {vmar.protect} API used for {SetPermissions} fails when called on
data memory with error -10 (ZX_ERR_INVALID_ARGS).
Skip fuchsia until we figure out the right API to use there.

R=cbruni@chromium.org

Bug: v8:13194
Change-Id: I20754f7212a892b8440f29658bf3db40f7745fe9
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3833820
Auto-Submit: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82494}

src/base/platform/platform-fuchsia.cc

@@ -293,7 +293,9 @@ bool OS::SetPermissions(void* address, size_t size, MemoryPermission access) {
 }
 
 void OS::SetDataReadOnly(void* address, size_t size) {
-  CHECK(OS::SetPermissions(address, size, MemoryPermission::kRead));
+  // TODO(v8:13194): Figure out which API to use on fuchsia. {vmar.protect}
+  // fails.
+  // CHECK(OS::SetPermissions(address, size, MemoryPermission::kRead));
 }
 
 // static