libf2c: remove unnecessary variables from FLAGS_TO_PASS

[Toon Moene]

Zack Weinberg wrote:

> Patch appended.  Bootstrapping on i686-linux now.

Assuming this worked the following is

>         * Makefile.in: Take PICFLAG and RUNTESTFLAGS out of FLAGS_TO_PASS.

OK - I don't know why they were there either.  Someone will scream if it
breaks their favorite setup.

Thanks !

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