RFR: 8290534: Move MacroAssembler::verified_entry to C2_MacroAssembler on x86 [v2]

[Erik Österlund]

> The MacroAssembler::verified_entry method is a C2 function. It belongs in C2_MacroAssembler. This patch moves it there on x86.

Erik Österlund has updated the pull request incrementally with one additional commit since the last revision:

  Fix 32 bit build

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9558/files
  - new: https://git.openjdk.org/jdk/pull/9558/files/a84d148d..14452a9b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9558&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9558&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9558.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9558/head:pull/9558

PR: https://git.openjdk.org/jdk/pull/9558