[gfortran, committed] Fix typos in rand.c and normalize.c

[Tobias Schlüter]

Steve Kargl wrote:
>>Built and tested on i686-pc-linux, approved by Paul on IRC.
> 
> 
> Tested?
> 

Well, I just tried again, without your fix. No problems in the
testsuite. We don't have a test for rand(), and apparently the linker on
i686-linux is not very tightly checking the object files it is passed.

I'm sorry for the breakage, and will not make such stupid mistakes again
(wishful thinking).

- Tobi