[jdk15u-dev] Integrated: 8257707: Fix incorrect format string in Http1HeaderParser

[Yuri Nesterenko]

A follow-up to JDK-8204679. Tests run well.

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Commit messages:
 - Backport c6f93ec9f21f6db64ad7c15c284b39ab6b0a676e

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/5/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=5&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257707
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/5.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/5/head:pull/5

PR: https://git.openjdk.java.net/jdk15u-dev/pull/5