restore sample code for C & Python

[aquynh]

Feature

• New architecture module
• Support for processor extension
• Add more instruction details (elaborated below)
• Binding support for: language
• Other (elaborated below)

The v4 has sample code, at least for C & Python, in test_xxx.c & test_xxx.py.
These code serve as example code on how to use Capstone.

We should restore them, perhaps in samples/ directories.

[XVilka]

"examples/" would be a better name, I think