188a9dd210
It turns out that gyp (libuv's new build system) wants x64 for a 64-bit x86 architecture and ia32 for a 32-bit architecture, so this performs the relevant mapping and then invokes libuv's configure script with the appropriate target architecture. This can be verified by running make with VERBOSE=1 and seeing that beforehand on a 64-bit build libuv was passed "-arch i386" and now it's passed "-arch x86_64" Closes #8826