Disable AVR targets on macOS due to homebrew issue

Homebrew issue with AVR toolchain is here
https://github.com/osx-cross/homebrew-avr/issues/205
diff --git a/testlist/other.dat b/testlist/other.dat
index 32ae18c..cfdae68 100644
--- a/testlist/other.dat
+++ b/testlist/other.dat
@@ -5,6 +5,14 @@
 -avr32dev1:nsh
 -avr32dev1:ostest
 
+# Disable AVR targets on macOS due to homebrew issue
+# https://github.com/osx-cross/homebrew-avr/issues/205
+-Darwin,teensy-2\.0:.*
+-Darwin,micropendous3:.*
+-Darwin,amber:.*
+-Darwin,arduino-mega2560:.*
+-Darwin,moteino-mega:.*
+
 /renesas/rx65n/rx65n-grrose
 /renesas/rx65n/rx65n-rsk2mb
 -Darwin,rx65n-grrose:.*