RFR: JDK-8276837: [macos]: Error when signing the additional launcher [v2]

[Andy Herrick]

> Before signing, unsign all executables and libraries (not just those in runtime).
> Also, run individual file sign and unsign commands in quiet mode.
> Also, add test case to SigningAppImageTest to test that signing app that has additional launcher works, and results in validly signed launcher and additional launcher (original reported problem).

Andy Herrick has updated the pull request incrementally with 85 additional commits since the last revision:

 - JDK-8276837: [macos]: Error when signing the additional launcher
 - 8277797: Remove undefined/unused SharedRuntime::trampoline_size()
   
   Reviewed-by: dholmes, stuefe
 - 8277789: G1: G1CardSetConfiguration prefixes num_ and max_ used interchangeably
   
   Reviewed-by: mli, tschatzl
 - 8277878: Fix compiler tests after JDK-8275908
   
   Reviewed-by: thartmann, chagedorn
 - 8277904: G1: Remove G1CardSetArray::max_entries
   
   Reviewed-by: tschatzl
 - 8277896: Remove unused BOTConstants member methods
   
   Reviewed-by: kbarrett
 - 8277450: Record number of references into collection set during gc
   
   Reviewed-by: kbarrett, iwalulya
 - 8277928: Fix compilation on macosx-aarch64 after 8276108
   
   Reviewed-by: shade, dholmes
 - 8275241: Unused ArrayList is created in RequestEngine.addHooks
   
   Reviewed-by: egahlin
 - 8276108: Wrong instruction generation in aarch64 backend
   
   Co-authored-by: Nick Gasson <ngasson at openjdk.org>
   Reviewed-by: aph, neliasso
 - ... and 75 more: https://git.openjdk.java.net/jdk/compare/34692c5d...2a3e19ff

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6636/files
  - new: https://git.openjdk.java.net/jdk/pull/6636/files/34692c5d..2a3e19ff

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6636&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6636&range=00-01

  Stats: 23719 lines in 463 files changed: 13755 ins; 6525 del; 3439 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6636.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6636/head:pull/6636

PR: https://git.openjdk.java.net/jdk/pull/6636