Vendor Teakra, make emulator own DSP RAM and add DSP RAM to fastmem (#806)

* DSP: Own DSP RAM and add it to fastmem

* Vendor Teakra

* Add MacOS support to fastmem

* Fix MacOS fastmem paths

* Fix iOS build

third_party/teakra/tests/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_executable(teakra_tests
+    dma.cpp
+    btdmp.cpp
+    interpreter.cpp
+    main.cpp
+    timer.cpp
+)
+
+target_include_directories(teakra_tests PRIVATE ../include/teakra/impl/)
+target_link_libraries(teakra_tests PRIVATE teakra catch)
+target_compile_options(teakra_tests PRIVATE ${TEAKRA_CXX_FLAGS})
+
+add_test(teakra_tests teakra_tests)