No changes to any files, the build thinks it has to compile jdk.localedata, and then recreate the jdk image and jimage, etc.
Then get the noisy errors about duplicate things.

philli% make test TEST=jdk_util
Building target 'test' in configuration 'linux-x86_64-normal-server-fastdebug'
Compiling 1949 files for jdk.localedata
Creating jdk jimage
Creating jdk server jimage
duplicate resource "META-INF/services/sun.management.spi.PlatformMBeanProvider", skipping
duplicate resource "META-INF/services/sun.management.spi.PlatformMBeanProvider", skipping
Creating jre jimage
duplicate resource "META-INF/services/sun.jvmstat.monitor.MonitoredHostService", skipping
duplicate resource "META-INF/services/com.sun.jdi.connect.Connector", skipping
duplicate resource "META-INF/services/sun.jvmstat.monitor.MonitoredHostService", skipping
duplicate resource "META-INF/services/sun.management.spi.PlatformMBeanProvider", skipping
duplicate resource "META-INF/services/sun.jvmstat.monitor.MonitoredHostService", skipping
make[3]: warning: -jN forced in submake: disabling jobserver mode.
echo "Running tests: jdk_util"
...