[jdk17u-dev] RFR: 8319197: Exclude hb-subset and hb-style from compilation

[Aleksey Shipilev]

Clean backport to improve JDK build times.

Yields a very reproducible improvement:


# Before:
CONF=linux-x86_64-server-fastdebug make clean images  1759.47s user 315.21s system 1957% cpu 1:45.98 total
CONF=linux-x86_64-server-fastdebug make clean images  1771.93s user 317.18s system 1981% cpu 1:45.42 total
CONF=linux-x86_64-server-fastdebug make clean images  1761.17s user 314.81s system 1969% cpu 1:45.39 total

# After:
CONF=linux-x86_64-server-fastdebug make clean images  1719.31s user 311.06s system 2139% cpu 1:34.91 total
CONF=linux-x86_64-server-fastdebug make clean images  1713.59s user 312.09s system 2135% cpu 1:34.87 total
CONF=linux-x86_64-server-fastdebug make clean images  1717.97s user 314.45s system 2124% cpu 1:35.65 total

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Commit messages:
 - Backport e1cae7203674bc288a63e6fb26f94b20e70c74fd

Changes: https://git.openjdk.org/jdk17u-dev/pull/2630/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2630&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319197
  Stats: 4 lines in 1 file changed: 3 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2630.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2630/head:pull/2630

PR: https://git.openjdk.org/jdk17u-dev/pull/2630