Bug#915739: openjdk-8-jre-dcevm still uses GCC 7 to build

[Matthias Klose]

Package: src:openjdk-8-jre-dcevm
Version: 8u181-1
Severity: serious
Tags: sid buster

Please use the default GCC for the package so that we can remove GCC 7 for the
buster release.