Fix //tools/jdk:gen_platformclasspath target on MacOSX
Fix //tools/jdk:gen_platformclasspath target on MacOSX

MacOSX's `mktemp` command requires the template parameter.

Closes #4576.

PiperOrigin-RevId: 185686952

werkt/bazel,ulfjack/bazel,safarmer/bazel,werkt/bazel,meteorcloudy/bazel,twitter-forks/bazel,meteorcloudy/bazel,twitter-forks/bazel,davidzchen/bazel,ButterflyNetwork/bazel,cushon/bazel,ulfjack/bazel,cushon/bazel,dslomov/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,perezd/bazel,davidzchen/bazel,katre/bazel,dslomov/bazel,werkt/bazel,perezd/bazel,ButterflyNetwork/bazel,perezd/bazel,safarmer/bazel,cushon/bazel,perezd/bazel,twitter-forks/bazel,cushon/bazel,dropbox/bazel,akira-baruah/bazel,akira-baruah/bazel,davidzchen/bazel,aehlig/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,akira-baruah/bazel,dropbox/bazel,davidzchen/bazel,meteorcloudy/bazel,dropbox/bazel,safarmer/bazel,davidzchen/bazel,dslomov/bazel-windows,katre/bazel,dropbox/bazel,aehlig/bazel,safarmer/bazel,davidzchen/bazel,katre/bazel,perezd/bazel,perezd/bazel,dslomov/bazel,bazelbuild/bazel,akira-baruah/bazel,bazelbuild/bazel,katre/bazel,dropbox/bazel,aehlig/bazel,bazelbuild/bazel,meteorcloudy/bazel,twitter-forks/bazel,ulfjack/bazel,werkt/bazel,davidzchen/bazel,twitter-forks/bazel,katre/bazel,dslomov/bazel,akira-baruah/bazel,aehlig/bazel,cushon/bazel,akira-baruah/bazel,dslomov/bazel-windows,ulfjack/bazel,ulfjack/bazel,meteorcloudy/bazel,katre/bazel,safarmer/bazel,ulfjack/bazel,dslomov/bazel,aehlig/bazel,dslomov/bazel,bazelbuild/bazel,cushon/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,dslomov/bazel-windows,werkt/bazel,dropbox/bazel,dslomov/bazel,safarmer/bazel,meteorcloudy/bazel,perezd/bazel,twitter-forks/bazel,aehlig/bazel,dslomov/bazel-windows,ulfjack/bazel,twitter-forks/bazel,bazelbuild/bazel,werkt/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,aehlig/bazel