Fix ImageProcessor OSS build

[metascroy]

Fix linker error in image processor in OSS build. Internal buck has this flag defined.

[pytorch-bot]

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❌ 2 New Failures

As of commit b99eb24 with merge base 7e4253a ():

NEW FAILURES - The following jobs have failed:

• Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, models) / linux-job (gh)
  RuntimeError: Command docker exec -t f7430048efe98c6dc3241985250dff11be12b069d1c52face58dfefc32f689e3 /exec failed with exit code 1
• Test WebGPU Backend / test-webgpu / test-backend-linux (webgpu, operators) / linux-job (gh)
  RuntimeError: Command docker exec -t 08db9adc738e0e4ce2903830dabfe6098fdcf1e5e190911c752e80e9ff1a4a48 /exec failed with exit code 1

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[meta-codesync]

@metascroy has imported this pull request. If you are a Meta employee, you can view this in D107482927.