RFR: 8258856: VM build without C1/C2 fails after JDK-8243205

[Hao Sun]

The declaration sites for JVM flags were changed by JDK-8243205 and the
subsequent JDK-8258074. As a result, undeclared identifier errors
occurred while building VM without compiler1 or compiler2 feature.

Making the corresponding header files included would fix it.

Note that we have tested locally with this patch, build without C1/C2 succeeded on Linux X86/AArch64 machines.

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Commit messages:
 - 8258856: VM build without C1/C2 fails after JDK-8243205

Changes: https://git.openjdk.java.net/jdk/pull/1876/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1876&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258856
  Stats: 4 lines in 3 files changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1876.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1876/head:pull/1876

PR: https://git.openjdk.java.net/jdk/pull/1876