Merge branch 'backport-2174-newline-glib-2-68' into 'glib-2-68'

Backport !2174 “data-to-c.py: generate new-line at the end of the file” to glib-2-68

See merge request GNOME/glib!2175

gio/data-to-c.py

@@ -10,7 +10,7 @@ with open(sys.argv[1], "rb") as f:
 b = [r"\x{:02x}".format(ord(c)) for c in in_data]
 
 out_data = 'const char {0}[] = "'.format(sys.argv[2])
-out_data += "".join(b) + '";'
+out_data += "".join(b) + '";\n'
 
 with open(sys.argv[3], "w") as f:
     f.write(out_data)