Include Mainline releases of IOS 12 and IOS 15 for Cisco 7200

[gitsakar]

The current definitions for Cisco 7200 do not list any Mainline releases. Could you please add definitions of below mainline releases to cisco-7200.gns3a?

Compressed Image

Filename	Filesize	MD5
c7200-a3jk9s-mz.124-25g.bin	31491956	3a78cb61831b3ef1530f7402f5986556
c7200-adventerprisek9-mz.152-4.M11.bin	56187628	cee15ae61eda8e10f983390cd0c829fe

Source:
For IOS 12.4.(25G) https://docs.gns3.com/docs/emulators/cisco-ios-images-for-dynamips/#ios-12425g-mainline
For IOS 15.2.4M(11) https://software.cisco.com/download/home/268437992/type/280805680/release/15.2.4M11 but seems Cisco has removed the link as they are not supporting it anymore. I found a snippet at https://www.reddit.com/r/ccnp/comments/mx9yr1/comment/gvoeb0q/

Uncompressed Image

Filename	Filesize	MD5	Idle-PC (my own experiment)
c7200-a3jk9s-mz.124-25g.image	71528984	9c7cc9b3f3b3571411a7f62faaa2c036	0x6066a998
c7200-adventerprisek9-mz.152-4.M11.image	128487680	9a2005ad09ce1ec6fe7cf9af1e9b099e	0x6062e5c0

[grossmj]

I have added the images. Thanks for the image details 👍