RFR: 8266206: Build failure after JDK-8264752 with older GCCs

[Aleksey Shipilev]

See the bug report for error log. It seems older GCCs dislike `const char*` as template argument without it being the `constexpr`. Since the bug is marked for eventual backports to 8u and 11u, I think we better play it safe and drop the template argument to `bool`, and select the message in the method body.

Additional testing:
 - [x] build passes with GCC 6.3.0
 - [x] build passes with GCC 9.3.0
 - [x] `jdk_jfr` passes

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Commit messages:
 - 8266206: Build failure after JDK-8264752 with older GCCs

Changes: https://git.openjdk.java.net/jdk/pull/3759/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3759&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266206
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3759.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3759/head:pull/3759

PR: https://git.openjdk.java.net/jdk/pull/3759