Merge branch 'release/v1.4.2'

Author: ivankravets

platform.json

@@ -12,7 +12,7 @@
     "type": "git",
     "url": "https://github.com/platformio/platform-linux_arm.git"
   },
-  "version": "1.4.1",
+  "version": "1.4.2",
   "packageRepositories": [
     "https://dl.bintray.com/platformio/dl-packages/manifest.json",
     "https://sourceforge.net/projects/platformio-storage/files/packages/manifest.json/download",

platform.py

@@ -21,7 +21,7 @@ class Linux_armPlatform(PlatformBase):
     @staticmethod
     def _is_native():
         systype = util.get_systype()
-        return not ("linux_arm" in systype or "linux_aarch64" in systype)
+        return "linux_arm" in systype or "linux_aarch64" in systype
 
     @property
     def packages(self):
@@ -31,7 +31,8 @@ def packages(self):
         return packages
 
     def configure_default_packages(self, variables, targets):
-        if self._is_native() and "wiringpi" in variables.get("pioframework"):
+        if not self._is_native() and "wiringpi" in variables.get(
+                "pioframework"):
             raise exception.PlatformioException(
                 "PlatformIO temporary does not support cross-compilation "
                 "for WiringPi framework. Please use PIO Core directly on "