[OE-core] [PATCH 4/6] gdb: upgrade from 7.4 to 7.4.1

[Kamble, Nitin A]

> > -SRC_URI[md5sum] = "7877875c8af7c7ef7d06d329ac961d3f"
> > -SRC_URI[sha256sum] =
> "e2c18e2f4a5feab897595455a3d623cebbba9e9dd2dbe9a5510ed7ad43ae01d2"
> > +SRC_URI[md5sum] = "5fb7fca9ef7a9e3cfee0e2f2c0e52051"
> > +SRC_URI[sha256sum] =
> "f99d2be831ead324712ae4f11868e07e545272f10aac4186060f1386f2629b3"
> >
> Got a WARNING here and the checksum is wrong.
> 
> Sau!

It was a cut/paste error, the sha256sum is one digit short. Somehow it did not raise error on my build.

I will fix the issue and send it along with other commits.

Nitin