compiler.tests.callstack-overflow: disable test for os x 64, see #1478

basis/compiler/tests/callstack-overflow.factor

@@ -66,6 +66,9 @@ os windows? [
         2 head ${ "kernel-error" ERROR-CALLSTACK-OVERFLOW } =
     ] must-fail-with
 
+    ! This test crashes with a Memory protection fault on OS X 64-bit
+    ! for some reason. See #1478
+    cpu x86.64? os macosx? and [
         ! Load up the stack until there is < 500 bytes of it left. Then
         ! run a big gc cycle. 500 bytes isn't enough, so a callstack
         ! overflow would occur during the gc which we can't handle. The
@@ -74,3 +77,4 @@ os windows? [
         ! play with.
         { } [ overflow/w-compact-gc ] unit-test
     ] unless
+] unless