RFR: 8146132: Excessive output from make test-image [v2]

[Coleen Phillimore]

> This change makes native output files be only printed when building with LOG=info, to make the build not have so many pages of output.
> Tested with GHA and locally (tbd)

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  This seems to do the right thing without summarizing the number of object files compiled for the tests.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/11930/files
  - new: https://git.openjdk.org/jdk/pull/11930/files/59fea279..e1a221f9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11930&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11930&range=00-01

  Stats: 9 lines in 2 files changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/11930.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11930/head:pull/11930

PR: https://git.openjdk.org/jdk/pull/11930