rapidquilt changes symlink to file copy when refreshing patch

[hramrach]

• add patch adding symlink to series.conf
• sequence with rapidquilt until the patch
• push and refresh patch

Expected: patch still adds symlink
Actual: patch now adds copy of the linked file

[mkubecek]

The primary problem IMHO is that rapidquilt doesn't really understand the syntax and doesn't apply such patch correctly. If you run scripts/sequence-patch.sh --rapid on current SLE15-SP2 or openSUSE-15.2 branch, you get

> ls -l tools/testing/selftests/powerpc/copyloops/
---------- 1 mike users   50 úno 17 08:53 memcpy_mcsafe_64.S

where the contents of the file created is what was supposed to be the link target:

../../../../../arch/powerpc/lib/memcpy_mcsafe_64.S

(i.e. the path, not the contents of the target file).

[hramrach]

https://bugzilla.suse.com/show_bug.cgi?id=1171699