Distribution.xml: Make libiio.pkg installable without using Rosetta

On Apple Silicon, the installer will require Rosetta 2 when installing
libiio unless the arch specifiers are added in the installer xml file.

Signed-off-by: AlexandraTrifan <Alexandra.Trifan@analog.com>

Distribution.xml.cmakein

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
 <installer-gui-script minSpecVersion="2" >
 	<title>Libiio</title>
-	<options customize="never" rootVolumeOnly="true" />
+	<options customize="never" rootVolumeOnly="true" hostArchitectures="i386,arm64"/>
 	<allowed-os-versions>
 		<os-version min="10.6.6" />
 	</allowed-os-versions>