Externals: Link against required libraries

* curl requires zlib
* hidapi when not using libudev requires libusb

Externals/curl/lib/CMakeLists.txt

@@ -13,5 +13,5 @@ add_library(
   ${SRCS}
   )
 
-target_link_libraries(curl ${MBEDTLS_LIBRARIES})
+target_link_libraries(curl ${MBEDTLS_LIBRARIES} z)
 target_compile_definitions(curl PUBLIC CURL_STATICLIB PRIVATE CURL_DISABLE_LDAP)

Externals/hidapi/CMakeLists.txt

@@ -14,6 +14,7 @@ else()
     target_link_libraries(hidapi PRIVATE udev)
   else()
     target_sources(hidapi PRIVATE libusb/hid.c)
+    target_link_libraries(hidapi PRIVATE usb)
   endif()
 endif()