[lworld] RFR: 8368519: [lworld]: TestRedundantLea.java#Spill fails

[Manuel Hässig]

The test case `compiler/codegen/TestRedundantLea.java#Spill`, recently introduced in #1605, fails due to too strict node counts. This PR relaxes those node counts to account for differences in code generation between platforms and machines.

Testing:
 - [x] tier1,tier2 plus stress testing

-------------

Commit messages:
 - Make node counts more fuzzy

Changes: https://git.openjdk.org/valhalla/pull/1631/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1631&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368519
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/valhalla/pull/1631.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1631/head:pull/1631

PR: https://git.openjdk.org/valhalla/pull/1631