[9] RFR(S) 8175052: [AOT] jaotc does not accept file name with .class

[Vladimir Kozlov]

https://bugs.openjdk.java.net/browse/JDK-8175052

http://cr.openjdk.java.net/~kvn/8175052/webrev/

After 8169588 change jaotc stop accepting file.class names. Add back such ability.
Print stack trace for "not found" error only with --info flag.
Also changed error message to be less confusing. Instead of:

Error: Failed to find: unknown:my.class
Error: Failed to find: classname:my.class

output:
Error: Failed to find file: my.class

when --class-name flag is used:
Error: Failed to find class file: my.class

Thanks,
Vladimir