RFR: 8275712: Hashtable literal_size functions are broken

[Stefan Karlsson]

The literal_size functions are used to estimate the size of held objects in some of our hashtables.

Two bugs:
1) They return int, but the returned value is in bytes and could be larger than MAX_INT.
2) Non-String objects report words instead of bytes.

Manually tested by running JFR and checking the output in JMC.

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Commit messages:
 - Remove tab
 - 8275712: Hashtable literal_size functions are broken

Changes: https://git.openjdk.java.net/jdk/pull/6063/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6063&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275712
  Stats: 33 lines in 2 files changed: 15 ins; 10 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6063.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6063/head:pull/6063

PR: https://git.openjdk.java.net/jdk/pull/6063