Notable this also means buildhistory-diff doesn't see symlinks either.

Hi Ross Burton,

I would like to support this bugfix.
Can you help to specify how to reproduce it?
I've tried to reproduce the bug by adding below code to bzip2 recipe. However, the output is of "oe-pkgdata-util list-pkg-files bzip2" is still correct. 

do_install:append () {
        install -d ${D}/bin
        echo "ABC" > ${D}/bin/test
        chmod 755 ${D}/bin/test
        ln -sf test ${D}/bin/symlink
        ln -sf test ${D}/bin/symlink2
}


> oe-pkgdata-util list-pkg-files bzip2
bzip2:
        /bin/symlink
        /bin/symlink2
        /bin/test
        /usr/bin/bunzip2.bzip2
        /usr/bin/bzcat.bzip2
        /usr/bin/bzcmp
        /usr/bin/bzdiff
        /usr/bin/bzegrep
        /usr/bin/bzfgrep
        /usr/bin/bzgrep
        /usr/bin/bzip2.bzip2
        /usr/bin/bzip2recover
        /usr/bin/bzless
        /usr/bin/bzmore

So I genuinely can't replicate this anymore.  I wish I could remember where I was seeing a problem but I can't and adding/removing symlinks from a recipe are working in oe-pkgdata-util and buildhistory, so maybe I was just doing something wrong.