Avoid Visual C++ compiler warning C4503.
Avoid Visual C++ compiler warning C4503.

Use the same method that we use to generate C/AvxHBDVarianceTest to
avoid Visual C++ compiler warning C4503 on SSE2/AvxHBDVarianceTest:
  decorated name length exceeded, name was truncated

BUG=aomedia:2122

Change-Id: I50a80d5f7512830c3b1ce998a50b613c5f268636

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom