RFR (XS) 8056971 - Minor class loading clean-up

[Ioi Lam]

Please review a very small fix:

http://cr.openjdk.java.net/~iklam/8056971_classloader_cleanup/

Bug: Minor class loading clean-up

     https://bugs.openjdk.java.net/browse/JDK-8056971

Summary of fix:

     Code review after the push of JDK-8046070 (Class Data Sharing 
cleanup and refactoring)
     has found some minor issues:

     + Misplacement of #if INCLUE_CDS
     + typos
     + unnecessary C string duplication
       -> in fixing this I converted a bunch of unnecessary
          "char*" to "const char*"

Tests:

     JPRT
     UTE vm.quick.testlist, vm.parallel_class_loading.testlist

Thanks
- Ioi