RFR (M): 8238854: Remove superfluous C heap allocation failure checks

[Thomas Schatzl]

Hi all,

   can I have reviews for this change that removes superfluous C heap 
allocation failure checks (basically hard-exiting the VM) because by 
default C allocation already exits the VM.

CR:
https://bugs.openjdk.java.net/browse/JDK-8238854
Webrev:
http://cr.openjdk.java.net/~tschatzl/8238854/webrev/
Testing:
hs-tier1-5 without differences

Thanks,
   Thomas