copy mingw import lib to OPENBLAS_ROOT for dynamic gfortran test

Author: mattip

tools/build_openblas.sh

@@ -106,6 +106,7 @@ make BINARY=$build_bits DYNAMIC_ARCH=1 USE_THREAD=1 USE_OPENMP=0 \
      MAX_STACK_ALLOC=2048 \
      $interface_flags
 make PREFIX=$openblas_root/$build_bits $interface_flags install
+cp -f "*.dll.a" "$openblas_root/$build_bits/lib/
 DLL_BASENAME=libscipy_openblas${SYMBOLSUFFIX}${LIBNAMESUFFIX}
 
 # OpenBLAS does not build a symbol-suffixed static library on Windows: