Fix unreachable issue links in 3.10 release notes

The 3.10 release notes mistakenly referenced some internal Google bug
tracking numbers instead of public Gerrit Code Review issue numbers,
resulting in broken links.

In cases where a public issue number is unavailable, this update
replaces the links with references to the actual code changes.

Change-Id: Ic76eae757ba6fbed6e36acc7bd423510c19bdeb9
1 file changed