package/openjdk{-bin}: add OpenJDK25 and configure it as latest

OpenJDK 25 is the latest release.
See: https://endoflife.date/oracle-jdk

- BR2_OPENJDK_VERSION_LATEST is now set to 25.

- Add version-specific patches for 25.0.2+10:
  - 0001: Add ARCv2 ISA processors support to Zero
  - 0002: Compile OpenJDK in headless mode without requirements
  - 0003: Fix ambiguous cmp() overload in aarch64 macro assembler
          (older GCC 6.x compatibility)
  - 0004: Fix constexpr on non-literal type in Shenandoah GC
          (older GCC 6.x compatibility)

- Add -fpermissive to fix template definition error with older GCC.

- Update HOST_OPENJDK_BIN_VERSION for OpenJDK 25.

- Update the expectedVersion variable in JniTest.java from 0x00150000
  (JNI 21) to 0x00180000 (JNI 24/25).

Tested with:
$ ./support/testing/run-tests -o ~/br-test-py/ -d ~/br-test-dl/ \
    tests.package.test_openjdk.TestOpenJdk

Signed-off-by: Thomas Devoogdt <thomas@devoogdt.com>
[Bernd:
 - rebased on bump of versions 17 & 21
 - build-tested with gcc 16-snapshot]
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[Julien:
 - add .checkpackageignore entry to fix check-package error
 - reformat patches with without numbering to fix check-package error
]
Signed-off-by: Julien Olivain <ju.o@free.fr>

support/testing/tests/package/br2-external/openjdk/package/openjdk-jni-test/JniTest.java

@@ -33,7 +33,7 @@ public class JniTest
 	public static void main(String[] args)
 	{
 		var actualVersion = JniWrapper.get_jni_version();
-		var expectedVersion = 0x00150000;
+		var expectedVersion = 0x00180000;
 		JniTest.Test(
 			"Get JNI Version",
 			actualVersion,