PR libfortran/24903 * m4/dotprodc.m4: Use __builtin_conj instead of assigning real and imaginary parts separately. * generated/dotprod_c4.c: Regenerated. * generated/dotprod_c8.c: Regenerated. * generated/dotprod_c10.c: Regenerated. * generated/dotprod_c16.c: Regenerated. From-SVN: r111131