RFR: 8261075: Create stubRoutines.inline.hpp with SafeFetch implementation

[Anton Kozlov]

Hi, 

Please reivew a small non-functional change that extracts inline SafeFetch functions to a separate file. This is preliminary work for JEP-391 integration that will reduce the size of that patch.

CC @dcubed-ojdk 

Thanks!

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Commit messages:
 - Update copyrights
 - Merge remote-tracking branch 'upstream/jdk/master' into 8261075-stubroutines-inline
 - Merge remote-tracking branch 'upstream/jdk/master' into 8261075-stubroutines-inline
 - Extract SafeFetch32/N to stubRoutines.inline.hpp

Changes: https://git.openjdk.java.net/jdk/pull/2542/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2542&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261075
  Stats: 86 lines in 11 files changed: 53 ins; 20 del; 13 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2542.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2542/head:pull/2542

PR: https://git.openjdk.java.net/jdk/pull/2542