Add all Machine headers.

This test file directly uses values from the MachineXX.h headers, so
include them directly.

Noticed when some riscv support was added.

Test: Builds.
Change-Id: I4bf0289556b748d7cffe83cbdf55c05967dc6078
diff --git a/libunwindstack/tests/AndroidUnwinderTest.cpp b/libunwindstack/tests/AndroidUnwinderTest.cpp
index e649105..28620e2 100644
--- a/libunwindstack/tests/AndroidUnwinderTest.cpp
+++ b/libunwindstack/tests/AndroidUnwinderTest.cpp
@@ -35,7 +35,11 @@
 
 #include <unwindstack/AndroidUnwinder.h>
 #include <unwindstack/Error.h>
+#include <unwindstack/MachineArm.h>
+#include <unwindstack/MachineArm64.h>
 #include <unwindstack/MachineRiscv64.h>
+#include <unwindstack/MachineX86.h>
+#include <unwindstack/MachineX86_64.h>
 #include <unwindstack/Regs.h>
 #include <unwindstack/RegsArm.h>
 #include <unwindstack/RegsArm64.h>