Merge pull request #26 from azmeuk/master

Linux build support.
[V28] Update source of Spidermonkey in Firefox v28
[v28] Adds building scripts for all platforms.
[v28] Add ios.m4.
[v28] Add support for iOS in configure.in.
[v28] Update configure with autoconf213
[v28] Patch for NumericConversions.h.
[v28] Patch for TypeDecls.h.
[v27] Update build for iOS with x86_64 version for 64 bit simulator
[v27] Add arm64 architecture in double-conversion
[v27] Fix a problem in autoconf that ios_arch for simulator is forced to i386
[v27] Update configure
[v28] Update build.sh
[v28] Add arm64 architecture in double-conversion
[v28] Fix a problem in autoconf that ios_arch for simulator is forced to i386
[v28] Update configure
Merge pull request #27 from pandamicro/27_64bit

[v27] Support arm64 and x86_64 architecture for iOS 64 bit device and simulator
[v28] Delete makefile and autoconf.mk to avoid gmake issue
[v28] Add build64.sh to build-ios
[v28] Compare original sources and cleanup