Rlease GCC ARM Embedded 4.7 update 1

Written for GNU Arm Embedded Toolchain by Joey Ye on 2013-03-29

4.7 2013q1 (update 1) is released at https://launchpad.net/gcc-arm-embedded/+milestone/4.7-2013-q1-update and https://launchpad.net/~terry.guo/+archive/gcc-arm-embedded

This update release fixes a couple of issues found in 4.7 major:
* Mac OS host version has python dependence
* LTO failure when installed in directory with space in path name
  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
* Load address of data sections containing aligned data
  http://sourceware.org/bugzilla/show_bug.cgi?id=15222
* libnosys doesn't check stack overflow
  https://answers.launchpad.net/gcc-arm-embedded/+question/218972
* librdimon.a doesn't match newlib-nano

It also gets the build configuration adjusted to enable:
- Basic Cortex-A profile multilib
- LTO (Link Time Optimization)

High recommended to update your 4.7 release with this version.