libhidapi, libusb externals (#319)

* A cross-platform library to access USB devices

Initial addition to the community index.

* A Simple library for communicating with USB and Bluetooth HID devices

Initial addition to the community index.

* Added licenses and Arch packages

Co-authored-by: Alejandro R. Mosteo <amosteo@unizar.es>

index/li/libhidapi/libhidapi-external.toml

@@ -0,0 +1,12 @@
+description = "A simple library for communicating with USB and Bluetooth HID devices"
+name = "libhidapi"
+licenses = "BSD-3-Clause OR GPL-3.0-only OR custom-hidapi"
+
+maintainers = ["Philip Munts <phil@munts.net>"]
+maintainers-logins = ["pmunts"]
+
+[[external]]
+kind = "system"
+[external.origin."case(distribution)"]
+"debian|ubuntu" = ["libhidapi-dev"]
+arch = ["hidapi"]

index/li/libusb/libusb-external.toml

@@ -0,0 +1,12 @@
+description = "A cross-platform library to access USB devices"
+name = "libusb"
+licenses = "LGPL-2.1-or-later"
+
+maintainers = ["Philip Munts <phil@munts.net>"]
+maintainers-logins = ["pmunts"]
+
+[[external]]
+kind = "system"
+[external.origin."case(distribution)"]
+"debian|ubuntu" = ["libusb-1.0-0-dev"]
+arch = ["libusb"]