udpate deatils of hellowrold_debugu task

Author: adinn

.travis.yml

@@ -27,6 +27,7 @@ matrix:
   - env: JDK="jdk8" GATE="style,fullbuild" PRIMARY="substratevm"
   - env: JDK="jdk8" GATE="build,test" PRIMARY="compiler"
   - env: JDK="jdk8" GATE="build,test,helloworld" PRIMARY="substratevm"
+  - env: JDK="jdk8" GATE="build,test,helloworld_debug" PRIMARY="substratevm"
   - env: JDK="jdk8" GATE="build,bootstraplite" PRIMARY="compiler"
   - env: JDK="jdk8" GATE="style,fullbuild,sulongBasic" PRIMARY="sulong"
     addons:

substratevm/mx.substratevm/mx_substratevm.py

@@ -359,6 +359,7 @@ def __getattr__(self, name):
 
 GraalTags = Tags([
     'helloworld',
+    'helloworld_debug',
     'test',
     'maven',
     'js',