Link to upstream in README.fuchsia

Upstream obtained from existing git remote

SEC-17

Change-Id: I09551f02a97555ca1da520ee2b44645a37aa8270
diff --git a/README.fuchsia b/README.fuchsia
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index 0000000..45d85ad
--- /dev/null
+++ b/README.fuchsia
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+Upstream Git: https://github.com/google/glog