ZERO uses UseSerialGC by default. After JDK-8290981 is integrated, when we dump the default CDS archive during the build process, it fails to dump the shared heap (which requires G1GC).

The fix is to force -XX:+UseG1GC when dumping the default CDS archive during the build process.

Out of caution, I am doing this in a separate RFE after JDK-8290981

Expected gain:

(Before)
$ perf stat -r 40 ./images/jdk/bin/java -version
0.018080 +- 0.000388 seconds time elapsed ( +- 2.15% )

(After)
$ perf stat -r 40 ./images/jdk/bin/java -version
0.011986 +- 0.000205 seconds time elapsed ( +- 1.71% )