RFR: 8273512: Fix the copyright header of x86 macroAssembler files [v2]

[Sandhya Viswanathan]

> Fix the copyright header of x86 macroAssembler files to match others.

Sandhya Viswanathan has updated the pull request incrementally with one additional commit since the last revision:

  implement review comments

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5424/files
  - new: https://git.openjdk.java.net/jdk/pull/5424/files/236b4db0..4e7f94d7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5424&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5424&range=00-01

  Stats: 33 lines in 11 files changed: 0 ins; 22 del; 11 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5424.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5424/head:pull/5424

PR: https://git.openjdk.java.net/jdk/pull/5424