Linux: Allow connecting Wiimotes via L2CAP (#1353)

cmake/Findbluez.cmake

@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: 2022 Andrea Pappacoda <andrea@pappacoda.it>
+# SPDX-License-Identifier: ISC
+
+find_package(bluez CONFIG)
+if (NOT bluez_FOUND)
+  find_package(PkgConfig)
+  if (PKG_CONFIG_FOUND)
+    pkg_search_module(bluez IMPORTED_TARGET GLOBAL bluez-1.0 bluez)
+    if (bluez_FOUND)
+      add_library(bluez::bluez ALIAS PkgConfig::bluez)
+    endif ()
+  endif ()
+endif ()
+
+find_package_handle_standard_args(bluez
+    REQUIRED_VARS
+    bluez_LINK_LIBRARIES
+    bluez_FOUND
+    VERSION_VAR bluez_VERSION
+)