Allow for effective UID of binaries (#286)

android/Shm.cpp

@@ -283,7 +283,7 @@ namespace android {
     }
 
     int Shm::GetUID() {
-        return getuid();
+        return geteuid();
     }
 
     int Shm::GetPID() {

common/JackTools.cpp

@@ -76,7 +76,7 @@ namespace Jack {
         return  _getpid();
         //#error "No getuid function available"
 #else
-        return getuid();
+        return geteuid();
 #endif
     }
 

common/shm.c

@@ -65,7 +65,7 @@ static int GetUID()
     return  _getpid();
     //#error "No getuid function available"
 #else
-    return getuid();
+    return geteuid();
 #endif
 }