Build linphone with relative prefix and vpx statically for Windows when targetting the desktop.

configs/config-desktop.cmake

@@ -109,7 +109,17 @@ endif()
 # Include builders
 include(builders/CMakeLists.txt)
 
+# linphone
+if(WIN32)
+	list(APPEND EP_linphone_CMAKE_OPTIONS "-DENABLE_RELATIVE_PREFIX=YES")
+endif()
+
 # sqlite3
 if(WIN32)
 	set(EP_sqlite3_LINKING_TYPE "-DENABLE_STATIC=YES")
 endif()
+
+# vpx
+if(WIN32)
+	set(EP_vpx_LINKING_TYPE "--enable-static" "--disable-shared" "--enable-pic")
+endif()