build/core: Apply more compiler optimizations

flags taken from VanirAOSP

Change-Id: Id9f3c54d1ced3ac42319fa6be8822eff590aa434

Specify -msse3 on host as on target.

Make the host and the target x86 build more uniform by using the same machine flags.
Its unlikely Android has ever been built on a machine without SSE3 support.

Bug: 8068608
Change-Id: I19635528b61bf2c6faf02c2e575b1d9bf8025d3a
build/core: Print TARGET_GCC_VERSION in dumpvar

Change-Id: If8e51735a618f06627bc97690f3c7cae4b9fb381
build: Apply changes to build with gcc 4.8+

Set gcc 4.8 toolchain for arm-eabi-
Set gcc 4.9 toolchain for arm-linux-androideabi-
Use TARGET_GCC_VERSION for Linaro compiler check

Change-Id: I072a072574680ea2a737b4c3df42ac4a85c33110
don't add lunch combo from device folders