Vendorize capstone

[endeav0r]

This is broken

falcon_capstone = {version="0.5.2", features=["vendor"]}

user@pc:~/code/falcon_capstone_dep_test$ cargo check
   Compiling falcon_capstone v0.5.2
error: failed to run custom build command for `falcon_capstone v0.5.2`

Caused by:
  process didn't exit successfully: `/home/user/code/falcon_capstone_dep_test/target/debug/build/falcon_capstone-f6bb15f2a705d813/build-script-build` (exit status: 101)
  --- stdout
  CMAKE_TOOLCHAIN_FILE_x86_64-unknown-linux-gnu = None
  CMAKE_TOOLCHAIN_FILE_x86_64_unknown_linux_gnu = None
  HOST_CMAKE_TOOLCHAIN_FILE = None
  CMAKE_TOOLCHAIN_FILE = None
  CMAKE_GENERATOR_x86_64-unknown-linux-gnu = None
  CMAKE_GENERATOR_x86_64_unknown_linux_gnu = None
  HOST_CMAKE_GENERATOR = None
  CMAKE_GENERATOR = None
  CMAKE_PREFIX_PATH_x86_64-unknown-linux-gnu = None
  CMAKE_PREFIX_PATH_x86_64_unknown_linux_gnu = None
  HOST_CMAKE_PREFIX_PATH = None
  CMAKE_PREFIX_PATH = None
  CMAKE_x86_64-unknown-linux-gnu = None
  CMAKE_x86_64_unknown_linux_gnu = None
  HOST_CMAKE = None
  CMAKE = None
  running: "cmake" "/home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/falcon_capstone-0.5.2/capstone" "-DBUILD_SHARED_LIBS=OFF" "-DCMAKE_INSTALL_PREFIX=/home/user/code/falcon_capstone_dep_test/target/debug/build/falcon_capstone-bb9055977811d22f/out" "-DCMAKE_C_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_C_COMPILER=/usr/bin/cc" "-DCMAKE_CXX_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_CXX_COMPILER=/usr/bin/c++" "-DCMAKE_ASM_FLAGS= -ffunction-sections -fdata-sections -fPIC -m64" "-DCMAKE_ASM_COMPILER=/usr/bin/cc" "-DCMAKE_BUILD_TYPE=Debug"

  --- stderr
  CMake Error: The source directory "/home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/falcon_capstone-0.5.2/capstone" does not exist.
  Specify --help for usage, or press the help button on the CMake GUI.
  thread 'main' panicked at '
  command did not execute successfully, got: exit status: 1

  build script failed, must exit now', /home/user/.cargo/registry/src/github.com-1ecc6299db9ec823/cmake-0.1.49/src/lib.rs:1104:5
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

I believe we need to fully vendorize capstone into this crate and cannot leave it as a submodule.