message: Fix build in MSYS2
diff: @@ -227,7 +227,7 @@ class BuildLibrary(build_ext):
  ]
  - if platform.system() == "Windows":
  + if platform.system() == "Windows" and not sysconfig.get_platform().startswith("mingw"):
  from setuptools import msvc
  cmake_args += [
  @@ -267,7 +267,7 @@ class BuildLibrary(build_ext):
  if self.distribution.doc:
  targets['doc'] = "lief-doc"
  - if platform.system() == "Windows":
  + if platform.system() == "Windows" and not sysconfig.get_platform().startswith("mingw"):
  if self.distribution.lief_test:
  subprocess.check_call(configure_cmd, cwd=self.build_temp, env=env)
  if build_with_ninja:
  @@ -319,7 +319,7 @@ class BuildLibrary(build_ext):
  libsuffix = pylief_dst.split(".")[-1]
  pylief_path = os.path.join(cmake_library_output_directory, "{}.{}".format(PACKAGE_NAME, libsuffix))
  - if platform.system() == "Windows":
  + if platform.system() == "Windows" and not sysconfig.get_platform().startswith("mingw"):
  pylief_base = pathlib.Path(cmake_library_output_directory) / "Release" / "api" / "python"
  pylief_path = pylief_base / "Release" / "{}.{}".format(PACKAGE_NAME, libsuffix)
  if not pylief_path.is_file():
  