Fix tar2files bazel integration

The names that are passed to bazeldnf need to include the
directory part too, otherwise having two files with the same
name in different paths triggers a failure:

  + bazel run --config x86_64 //rpm:sandbox_s390x
  ...
  Error in _tar2files: generated file 'cc-toolchain_s390x/errno.h'
  in rule 'cc-toolchain_s390x/usr/include/asm' conflicts with
  existing generated file from rule 'cc-toolchain_s390x/usr/include'

Signed-off-by: Andrea Bolognani <[email protected]>

internal/rpmtree.bzl

@@ -126,7 +126,7 @@ def tar2files(**kwargs):
             name = basename + k
             files = []
             for file in v:
-                files = files + [basename + "/" + file]
+                files = files + [name + "/" + file]
             _tar2files(
                 name = name,
                 prefix = k,