A64: Skip tests that emit invalid branch instructions

test/mozilla/mozilla.status

Index: test/mozilla/mozilla.status
diff --git a/test/mozilla/mozilla.status b/test/mozilla/mozilla.status
index aa864ce0b86fc837cfd4a6b979e7b7fd8f111989..207e6c7d905e5a0676180c674533c5ebbe98ef4f 100644
--- a/test/mozilla/mozilla.status
+++ b/test/mozilla/mozilla.status
@@ -842,6 +842,14 @@
 }],  # 'arch == arm or arch == a64'
 
 
+['arch ==  a64', {
+  # BUG(3148): Invalid branch instruction emitted.
+  'mozilla/ecma/Date/15.9.5.26-1': [SKIP],
+  'mozilla/js1_5/extensions/regress-396326': [SKIP],
+  'mozilla/js1_5/Regress/regress-80981': [SKIP],
+}],  # 'arch ==  a64'
+
+
 ['arch == mipsel', {
 
   # BUG(3251229): Times out when running new crankshaft test script.