Fix up mis-accelerated binaries

Fix up mis-accelerated binaries

1. Enable /bin/sh acceleration
2. Accelerate gcc-{version}
   gcc-6.2.1 listed in $binaries list but not accelerated
3. Move gcov to the gcc binaries group (was not processed correctly)

qemu-accel changes:

- Changed symlinks:
  from: /emul/usr/binsh -> bash
  to: /emul/usr/bin/sh -> bash

- New executable file:
  /emul/usr/bin/gcc-6.2.1

- New symbolic link:
  /emul/usr/bin/armv7l-tizen-linux-gnueabi-gcov -> gcov

Change-Id: I8b2fae83bb5a1009c98175d96065fdb4dedb6210