8065914: Various improvements and cleanup of build system

Reviewed-by: erikj
diff --git a/make/jprt.properties b/make/jprt.properties
index dbe2708..368afe4 100644
--- a/make/jprt.properties
+++ b/make/jprt.properties
@@ -154,7 +154,7 @@
     ${my.test.target.set:TESTNAME=jdk_lang},				\
     ${my.test.target.set:TESTNAME=jdk_math},				\
     ${my.test.target.set:TESTNAME=jdk_util}
-    
+
 # Default vm test targets (testset=core)
 my.test.targets.core=