Add the desktop entry used by Linux package installs.
This lets desktop environments expose the Unix build as a normal
application without package scripts generating the file at install time.
--- /dev/null
+[Desktop Entry]
+Type=Application
+Name=WinUAE
+GenericName=Amiga Emulator
+Comment=Configure and run Amiga emulation
+Exec=winuae %f
+Icon=winuae
+Terminal=false
+Categories=Game;Emulator;
+MimeType=application/x-winuae-config;
+StartupNotify=false
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+ <mime-type type="application/x-winuae-config">
+ <comment>WinUAE configuration</comment>
+ <glob pattern="*.uae"/>
+ </mime-type>
+</mime-info>