[PATCH] Simplify flag munging for rndjent.c

[NIIBE Yutaka]

"Harmen Stoppels" <harmen at stoppels.ch> writes:
> Any examples of compilers that do not do that?

Since we occasionally got reports from IBM, this time, I tested on AIX,
specifically, on the cfarm111 machine [0].

For the IBM XL C compiler on that machine, appending -O0 doesn't work as
you intended.  While it allows multiple -O[number] options, its decision
seems to be most higher optimization level among multiple options.

[0] https://portal.cfarm.net/machines/list/
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