The linux-arm32 build generates a somewhat spectacular number of warnings, all 
for the same code - the offset_of macro in hotspot:


src/hotspot/share/utilities/globalDefinitions_gcc.hpp:144:40: warning: 
requested alignment 16 is larger than 8 [-Wattributes]
    alignas(16) char space[sizeof (klass)];


I was hoping to find a simple fix for the code in question but I'm not sure 
what that would look like. Until proven otherwise I propose that we disable the 
warning for arm32.

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

Commit messages:
 - 8318481: linux-arm32 attribute warning for offset_of

Changes: https://git.openjdk.org/jdk/pull/16256/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16256&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318481
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/16256.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16256/head:pull/16256

PR: https://git.openjdk.org/jdk/pull/16256

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