Summary: * Validate and release Linaro binary toolchain 2012.09 * Identify the root cause of dwarf check fail in native build when enabling shrink-wrap.

Details: 1. Validate and release Linaro binary toolchain 2012.09.

2. Analyze the dwarf check fail in native build when enabling shrink-wrap: * Root cause: tail calls from simple-return path and normal return path are optimized as one common tail call. * To fix it, use simple-return to indicate the one from simple-return path, which will block the optimization to mix them.

Plans: * Test shrink-wrap performance.

Planed leaves: * Sept. 30 - Oct. 7: Mid-Autumn Festival and National Day of China's holiday.

Best regards! -Zhenqiang