ghdl: update to 1.0.0.r964.g70f3c162b

[umarcor]

I had to add *-gcc-ada as makedepends, because gnatmake would not be found otherwise. I thought that both makedepends and depends were installed before executing build(). Did the behaviour change?

[MehdiChinoune]

I thought that both makedepends and depends were installed before executing build().

When depends() is global (not inside another function).

Did the behaviour change?

previously CI install toolchain (which gcc-ada is part of) before any build. now It is required to mention the compiler in makedepends