Update iPhone build documentation for ARM7 (coolstar's clang toolchain)

doc/iphone

@@ -4,7 +4,7 @@ Setup SDK
    Extras: 
      apt-get install wget inetutils rsync
    Mercurial:
-     apt-get install python setuptools
+     apt-get install git expat curl
 
 2) Download missing packages from lolcathost:
   wget http://lolcathost.org/b/libgcc_4.2-20080410-1-6_iphoneos-arm.deb
@@ -38,3 +38,46 @@ Usage
   export PATH=${R2DIR}/bin:$PATH
   export DYLD_LIBRARY_PATH=${R2DIR}/lib
   r2 ...
+
+ARM7 SDK
+========
+From comstar
+
+ apt-get install basename git make expat 
+ apt-get install org.coolstar.iostoolchain
+
+* Copy crt1.o and dylib1.o from your iOS SDK into /usr/lib
+
+ /Applications//Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/
+
+* Current r2 build requires 'gcc' as native compiler to
+  build a standalone 'sdb' to precompile some files. This
+  dependency will be probably
+
+  cd /usr/bin
+  ln -fs clang gcc
+ 
+Build:
+======
+  export CC=clang
+  export CFLAGS=-I/var/include
+  export CPPFLAGS=-I/var/include
+  ./configure --prefix=/usr --with-ostype=darwin
+  make
+  make symstall
+
+Packaging
+=========
+  rm -rf /tmp/r2
+  make install DESTDIR=/tmp/r2
+  cd /tmp/r2
+  tar czvpf ../r2.tgz *
+
+// Clone the cydia repo from radare's github
+
+  git clone https://github.com/radare/cydia
+  cd cydia/radare2*
+  mkdir root
+  tar xzvf r2.tgz -C root
+  vim CONFIG # bump version
+  make