RFR: Various build fixes

[William Kemper]

A hodge-podge of fixes:
* 32bit/64bit int assignment errors on windows
* missing precompiled header
* incorrect format specifiers
* skip initialization of shenandoah unit tests when shenandoah is not running

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Commit messages:
 - Merge branch 'openjdk:master' into build-fixes
 - Fix another use of MARKING.
 - Fix type warning, disable setup for Shenandoah tests when not running ShenandoahGC.
 - Fix typo
 - Various build fixes

Changes: https://git.openjdk.org/shenandoah/pull/174/files
 Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=174&range=00
  Stats: 26 lines in 5 files changed: 12 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/shenandoah/pull/174.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah pull/174/head:pull/174

PR: https://git.openjdk.org/shenandoah/pull/174