Android: Ensure that ANDROID_NDK_ROOT is set while parsing the mkspec

Task-number: QTCREATORBUG-11821
Change-Id: Icbf8d6dd84da6ddba7d9c9e540916a804fb962f1
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>

src/plugins/android/androidqtversion.h

@@ -53,6 +53,7 @@ public:
     QList<ProjectExplorer::Abi> detectQtAbis() const;
 
     void addToEnvironment(const ProjectExplorer::Kit *k, Utils::Environment &env) const;
+    Utils::Environment qmakeRunEnvironment() const;
 
     Core::FeatureSet availableFeatures() const;
     QString platformName() const;