[master] RFR: OMWorld: Remove BasicLock* restrictions

[Axel Boldt-Christmas]

This is based on #159 

The main idea is to remove the restrictions where the `BasicLock*` may be missing when calling into the runtime. This is only an issue on x86_32. For now simply call into the runtime at the places where the registers are lacking. `quick_enter` should take care of the cases where we otherwise would have skipped calling into the runtime, as x86_32 calls into the runtime regardless (to get the thread) this may even be performance neutral.

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Commit messages:
 - Merge branch 'usptream_lilliput:pr/159' into lilliput-om-always-take-basiclock
 - Introduce CacheSetter and move cache updates out of inflate_and_enter
 - Update src/hotspot/share/runtime/lightweightSynchronizer.hpp
 - Cleanup after 24ed7d7: Fix missed lock change
 - Remove x86_32 imposed limitations on BasicLock*
 - Unify x86 and x64 C2_MacroAssembler::fast_unlock_lightweight
 - Remove monitorenter_obj
 - Fix missed lock change
 - Cleanup ObjectMonitor::enter and LightweightSynchronizer::inflate_and_enter
 - Cleanup and fix enter / enter_for distinction

Changes: https://git.openjdk.org/lilliput/pull/160/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput&pr=160&range=00
  Stats: 404 lines in 16 files changed: 143 ins; 148 del; 113 mod
  Patch: https://git.openjdk.org/lilliput/pull/160.diff
  Fetch: git fetch https://git.openjdk.org/lilliput.git pull/160/head:pull/160

PR: https://git.openjdk.org/lilliput/pull/160