Support for iPhone tools in the build system:
 - more flexible redeclaration of build tools. Now users may
   override build tools with environment variables, e.g.
   CC, AR, RANLIB, etc.
 - added configure-iphone: configure wrapper for iphone
 - tested with iPhone 2.x SDK

This closes #1050


git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/iphone@3168 74dad513-b988-da41-8d7b-12977e46ad98
7 files changed