Add wrapper functions of BLAS dnrm2 routine. #30379

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1653 1136aad2-a195-0410-b898-f5ea1d11b9d8
Use Dnrm2 in BFGS routine. #30379

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1654 1136aad2-a195-0410-b898-f5ea1d11b9d8