Add ppc64le platform support

[Jenkins-J]

The platforms bazel module now defines a separate constraint for ppc6l4e. Utilize the new constraint value for the ppc64le architecture.

[hvadehra]

@Jenkins-J Please fix CI. I think it should just be a matter of updating the @platforms dep in the WORKSPACE files as well:

rules_java/java/rules_java_deps.bzl

Line 159 in 4b91b00

def rules_java_dependencies():

[Jenkins-J]

@hvadehra It looks like all the tests are passing. Thank you so much for your help!

[hvadehra]

Thanks.

So, the existing ppc jdks were already for ppc64le but before this change we were using the less specific ppc cpu constraint from @platforms. So I think what we want to do is replace all references to ppc with ppc64le (instead of adding it additionally) and drop these hacky lines:

• rules_java/java/bazel/repositories_util.bzl

  Lines 100 to 101 in 4e83620

  	elif cpu == "ppc":
  	suffix = "_ppc64le"

• rules_java/java/bazel/repositories_util.bzl

  Lines 129 to 130 in 4e83620

  	if cpu == "ppc":
  	arch = "ppc64le"

Please also sync to HEAD to resolve the merge conflict.