Remove -fcheck-new arguments causing crashes on Xcode >5.1

According to  Xcode Release Notes:
The Apple LLVM compiler in Xcode 5.1 treats unrecognized command-line options as errors.

Since according to http://gcc.gnu.org/onlinedocs/gcc-3.4.5/gcc/C_002b_002b-Dialect-Options.html
the -fcheck-new is normally unecessary we actually don't need it.

Change-Id: I0ea9e9aa7d95eaa3e12136ba190370b114e74992