maintainer-feedback requested: [Bug 280560] java/openjdk11: fix build with clang 19

Bugzilla Automation <bugzilla@FreeBSD.org> has asked freebsd-java (Nobody)
<java@FreeBSD.org> for maintainer-feedback:
Bug 280560: java/openjdk11: fix build with clang 19
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280560



--- Description ---
Clang 19 is now more strict about undefined integral expressions used as
constants in enum, which results in errors compiling java/openjdk11,
similar to:

   
/wrkdirs/usr/ports/java/openjdk11/work/jdk11u-jdk-11.0.24-8-1/src/jdk.pack/shar
e/native/common-unpack/constants.h:206:33:
error: expression is not an integral constant expression
      206 |	AO_UNUSED_MBZ		  = (-1)<<13, // options bits reserved
for future use.
	  |				    ^~~~~~~~
   
/wrkdirs/usr/ports/java/openjdk11/work/jdk11u-jdk-11.0.24-8-1/src/jdk.pack/shar
e/native/common-unpack/constants.h:206:37:
note: left shift of negative value -1
      206 |	AO_UNUSED_MBZ		  = (-1)<<13, // options bits reserved
for future use.
	  |					^

Replace the negative value with ~0u to fix this error.