Add project files.

source/examples/HotReloadDemo/CMakeLists.txt

@@ -0,0 +1,11 @@
+# _discover_module_subdirectories() (cmake/BuildHelpers.cmake) only
+# add_subdirectory()'s the IMMEDIATE children of source/examples/ --
+# this file exists purely so that mechanism finds this folder at all,
+# then hands off to its three real targets: one host executable and
+# two builds of the same plugin (see PluginV1/CMakeLists.txt for why
+# two separate builds rather than one). Shared/ has no CMakeLists.txt
+# of its own -- it is just PluginApi.h, pulled in by PluginV1/PluginV2
+# via target_include_directories(), not add_subdirectory().
+add_subdirectory(PluginV1)
+add_subdirectory(PluginV2)
+add_subdirectory(Host)