RFR: 8296758: [BACKOUT] Revert 8296115

[Julian Waters]

8296115 unfortunately did not prove to be as useful as expected, revert it and reopen 8241499 for a future change.

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Commit messages:
 - flags-cflags.m4

Changes: https://git.openjdk.org/jdk/pull/11077/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11077&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8296758
  Stats: 16 lines in 1 file changed: 0 ins; 16 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/11077.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11077/head:pull/11077

PR: https://git.openjdk.org/jdk/pull/11077