Disable DDR support for AIX/JDK13/OpenJ9 (adoptium#1399)

* Revert "Nightly build inhibit (adoptium#1326)"

This reverts commit 88e638d.

* Disable DDR for AIX/JDK13/J9 builds

build-farm/platform-specific-configurations/aix.sh

@@ -64,6 +64,10 @@ then
     export PATH=/opt/freeware/bin:$JAVA_HOME/bin:/usr/local/bin:/opt/IBM/xlC/16.1.0/bin:/opt/IBM/xlc/16.1.0/bin:$PATH
     export CC=xlclang
     export CXX=xlclang++
+    # J9 JDK13 will break with an error building against libdwarf without this at present
+    if [ "${VARIANT}" == "${BUILD_VARIANT_OPENJ9}" ]; then
+      export CONFIGURE_ARGS_FOR_ANY_PLATFORM="${CONFIGURE_ARGS_FOR_ANY_PLATFORM} --disable-ddr"
+    fi
   else
     export PATH=/opt/freeware/bin:$JAVA_HOME/bin:/usr/local/bin:/opt/IBM/xlC/13.1.3/bin:/opt/IBM/xlc/13.1.3/bin:$PATH
   fi