Update readme

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Common: Remove unused code

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Common: Add helper function to extract vendor name

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Toolchain: Rewrite build script

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>