update gc options

Author: lgranie

jdtls

@@ -28,5 +28,6 @@ java -Declipse.application=org.eclipse.jdt.ls.core.id1 \
      # set stack size for each thread
      -Xss2m \
      # tweak garbage collection
-     -XX:+UseParallelOldGC
+     -XX:+UseG1GC \
+     -XX:+UseLargePages