Fix typo in FIXME

...if we can't fix the FIXME itself.

src/include/build.sh

     #
     # Create distributable tarball
     #
-    #FIXME: lacking Makefile skills, we do this step twice fot
+    #FIXME: lacking Makefile skills, we do this step twice for
     #       rpmstuff, hence -f hack for gzip
     #
     local version           # tarball version