RFR(S): 8058827: XCode 6.0 (Clang) warning "operator new' should not return a null pointer unless..."

[David Chase]

bug: https://bugs.openjdk.java.net/browse/JDK-8058827
webrev: http://cr.openjdk.java.net/~drchase/8058827/webrev.00/

Problem: I decided I would find trouble before it found me, and installed XCode 6 and tried a fastdebug build.
There appears to be one stopper, which is this warning compiling hotspot:

/Users/dr2chase/work/jdk9/hotspot/src/share/vm/memory/allocation.cpp:698:3: error: 'operator new' should not return a null pointer unless it is declared 'throw()' [-Werror,-Wnew-returns-null] 
  return 0; 
  ^ 

The file in question has a comment warning against careless meddling, so I did not touch the signature,
and instead rewrote the zero as a static.

Testing:
compilation on Mavericks + XCode 6.0.1, compilation on Ubuntu 13.10 + Gcc 4.8, both fastdebug.

I ran jtreg on hotspot/test/compiler and it looked basically functional (i.e., about as many failures as usual, about a dozen).

David