8224796: C code is not compiled correctly due to undefined "i386"

[vpa1977]

openjdk 11 had JDK-8224087 backported. This broke x86 hotspot serviceability due to undefined i386:

java.lang.UnsatisfiedLinkError: 'long[] sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(int)'
	at jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.getThreadIntegerRegisterSet0(Native Method)
	at jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1GetThreadIntegerRegisterSetTask.doit(LinuxDebuggerLocal.java:560)
	at jdk.hotspot.agent/sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:175)

$objdump  -t build/bootcycle-build/jdk/lib/libsaproc.so  | grep getThreadIntegerRegisterSet0
$

This backport of JDK-8224796 fixes C compilation:

$ objdump -t ~/libsaproc.so | grep getThreadInteger
00003260 g     F .text	00000192              Java_sun_jvm_hotspot_debugger_linux_LinuxDebuggerLocal_getThreadIntegerRegisterSet0

Note: unrelated test failure of macosx serviceability, e.g. see #3136

---

Progress

• Change must not contain extraneous whitespace
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• JDK-8224796 needs maintainer approval

Issue

• JDK-8224796: C code is not compiled correctly due to undefined "i386" (Bug - P3 - Requested)

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[bridgekeeper]

👋 Welcome back vpetko! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[openjdk]

⚠️ @vpa1977 This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[vpa1977]

/approval request openjdk 11 had JDK-8224087 backported. This broke x86 hotspot serviceability due to undefined i386 symbol. The backport risk is low - it enables compilation of the missing symbol.

[openjdk]

@vpa1977
8224796: The approval request has been created successfully.

[mlbridge]

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