compile php with multiple cpus

[anything]

Suggest adding an option to detect and use all cpu's when compiling php.
On an 8 core system I changed your build script from "make" to "make -j 8" and reduced my php compile time down from "this is taking too long" to less than 30 seconds.

Of course, this option should be optional. Some day I may want it to go slow so that the server is not slow for the web users.