Summary: * Enhance crosstool-ng build process.

Details: 1. crosstool-ng patches: * Reproduce the build process by following the README and enhance the document. * Update .config to strip all toolchain executables * Replace harded-coded VERSION by reading config file. * Remove host libiberty.a * Patch on how to strip debug sections is in discussion.

2. Update the crosstool-ng based embedded toolchain build scripts according to the review comments. And replace most of hard-coded config by reading them from .config.

3. Unexpected build fail for gcc 4.7/trunk from crosstool-ng due to unsupported ENDIAN_LDFLAG "-EL", which is used in "LDFLAGS_FOR_TARGET" to build libstdc++. (LDFLAGS_FOR_TARGET seams not used in gcc 4.6). Need more investigation.

Plan: * Fix the binary build related bugs. * Ramp-up on gcc.

Planned Absence: * Jan 21-29, 2012 Chinese Spring Festival

Best regards! -Zhenqiang