RFR: 8262366: Update glib to version 2.66.7

[Kevin Rushforth]

On Thu, 1 Apr 2021 12:19:40 GMT, Kevin Rushforth <kcr at openjdk.org> wrote:

>> Alexander tried it on our CI build machine yesterday and it builds fine there, too. I should add that I was building on a very old Ubuntu 16.04 system.
>> 
>>> Since this PR introduces memset in the audio-buffer.c file, I think it is safest to include string.h in this file as well, as this removes the dependency on that file to be included indirectly.
>> 
>> I was thinking the same thing. There is one more file that should include `<string.h>`: `qtdemux_tags.c` uses `strlen`and fails to compile on my system. With the change to include `string.h` in those two files, the build now passes on my system.
>
> All my testing looks good on all three platforms. I'll take a look at the diffs next.
> 
> One thing I did spot is that you need to update `gstreamer.md` and `glib.md` to bump the version numbers.

It now builds for me on my old Linux box. And the changes to the /legal/ files looks good.

One more thing I just thought of: we should do a test build on macOS aarch64. I have no reason to believe that there will be a problem, but worth double-checking.

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PR: https://git.openjdk.java.net/jfx/pull/447