RFR 8218619 [lworld] Execute all test scenarios with C1

[Ioi Lam]

https://bugs.openjdk.java.net/browse/JDK-8218619
http://cr.openjdk.java.net/~iklam/valhalla/8218619-execute-all-test-scenarios-with-c1.v01/

When testing C1, we used to just test the 1st of 6 possible scenarios 
[1]. With this patch,
all 6 scenarios are executed, and I've found a few more bugs in C1's 
handling of value types.

What's changed:

+ Fixed 2 simple C1 bugs in this patch.
     - I filed a few bugs to track the other failures

+ Added a new @TempSkipForC1 to skip some test cases that are known
   to fail with C1.

+ I also fixed TestOnStackReplacement.java to terminate
   when the test method is OSR-compiled. This significantly
   speeds up the test.


Testing -- all tests passed with:

     jtreg -vmoptions:-XX:+EnableValhallaC1 
-vmoptions:-XX:TieredStopAtLevel=1 .


Notes:

[1] 
http://hg.openjdk.java.net/valhalla/valhalla/file/bd2896e93b2c/test/hotspot/jtreg/compiler/valhalla/valuetypes/ValueTypeTest.java#l199


Thanks
- Ioi