xfail more external syntax extension tests on android

src/test/compile-fail/macro-crate-unexported-macro.rs

@@ -10,6 +10,7 @@
 
 // aux-build:macro_crate_test.rs
 // xfail-stage1
+// xfail-android
 
 #[feature(phase)];
 

src/test/compile-fail/phase-syntax-doesnt-resolve.rs

@@ -10,6 +10,7 @@
 
 // aux-build:macro_crate_test.rs
 // xfail-stage1
+// xfail-android
 
 #[feature(phase)];
 

src/test/run-pass-fulldeps/macro-crate.rs

@@ -11,6 +11,7 @@
 // aux-build:macro_crate_test.rs
 // xfail-stage1
 // xfail-fast
+// xfail-android
 
 #[feature(phase)];