RFR: 8253253: Binutils tar ball extension update to gz

Wed Sep 16 17:08:35 UTC 2020

Our infra team found this error when building DevKit with GCC 4.9.2. The binutils version is 2.25, and an *.xz doesn't
exist on https://ftp.gnu.org/pub/gnu/binutils.  Hence, we would like to submit a PR to update *.xz to *.gz.

We have confirmed that *.gz exists for all binutil version.

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Commit messages:
 - Fix linux GCC 4.9.2 devkit binutils url error

Changes: https://git.openjdk.java.net/jdk/pull/162/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=162&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253253
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/162.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/162/head:pull/162

PR: https://git.openjdk.java.net/jdk/pull/162