Use generic/dot.c instead of the inferior arm/dot.c for x86 DSDOT
Use generic/dot.c instead of the inferior arm/dot.c for x86 DSDOT

to resolve dsdot utest failure seen in #1492
xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS