RFR: 8332461: ubsan : dependencies.cpp:906:3: runtime error: load of value 4294967295, which is not a valid value for type 'DepType'

[Amit Kumar]

The error mentioned in the JBS issue is seen on x86_64 as well as on s390x during the build, with `--enable-ubsan` configuration. 

I have added `-1` to enum to fix this issue for now as mentioned by @MBaesken. But removing the assert itself is also a possible solution, mentioned on the JBS issue. 

So I will happy to follow the reviews/suggestion if this is not a good fix.

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Commit messages:
 - make ubsan happy

Changes: https://git.openjdk.org/jdk/pull/20847/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20847&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8332461
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20847.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20847/head:pull/20847

PR: https://git.openjdk.org/jdk/pull/20847