build: init cmake build system for am

abstract-machine/klib/tests/CMakeLists.txt

@@ -0,0 +1,17 @@
+set(TEST_SOURCES
+    stdio
+    string
+)
+
+foreach(TEST IN LISTS TEST_SOURCES)
+    add_executable(${TEST} ${TEST}.c)
+    target_link_libraries(${TEST} am-${ARCH} klib m)
+    target_include_directories(${TEST}
+        PRIVATE $<TARGET_PROPERTY:am_interface,INTERFACE_INCLUDE_DIRECTORIES>
+        PRIVATE $<TARGET_PROPERTY:klib_interface,INTERFACE_INCLUDE_DIRECTORIES>
+    )
+    # TODO: Run tests in other configurations
+    if(__PLATFORM_NATIVE__)
+        add_test(NAME ${TEST} COMMAND ${TEST})
+    endif()
+endforeach()