Allow debug symbols install to be skipped if they are not present

[amyspark]

Hi,

This PR is to address an issue found in AOMediaCodec/libavif#2228 (comment) . PDB symbols being missing (due to the release profile or strip being set) should not cause an install failure.

Let me know what you think.

[lu-zero]

This weekend I will cut a 0.10.1 with this fix.

[wantehchang]

Thank you for the fix. I have tested this commit in AOMediaCodec/libavif#2228. Now the rav1e build succeeds with the following messages in the output log (please expand "Build libavif (ninja)"):

  Installing pkg-config file
  Installing header file
  Installing static library
      Absent debugging information

Note that "Absent" is not aligned with "Installing". Is that indentation expected?

[lu-zero]

Yes, the first word is a tag. probably it could be made a a debug message instead though..

[wantehchang]

Did you mean the "Installing" tag is not indented, but the "Absent" tag is indented?

[lu-zero]

The first word is a right-aligned tag that has a color (green), the rest is a left-aligned message.

https://docs.rs/cargo/0.80.0/cargo/core/shell/struct.Shell.html#method.status

[wantehchang]

Thank you for the explanation. I didn't notice that 'Installing" and "Absent" are right-aligned. I only looked on the left.

[lu-zero]

You should notice it with cargo itself as well :)