Use generic C for D/Z nrm2 kernels on Windows to work around fpu exception bug

Author: martin-frbg

kernel/x86_64/KERNEL

@@ -259,8 +259,12 @@ SNRM2KERNEL = nrm2_sse.S
 endif
 
 ifndef DNRM2KERNEL
+ifeq ($(OSNAME),WINNT)
+DNRM2KERNEL = ../arm/nrm2.c
+else
 DNRM2KERNEL = nrm2.S
 endif
+endif
 
 ifndef QNRM2KERNEL
 QNRM2KERNEL = nrm2.S
@@ -271,8 +275,12 @@ CNRM2KERNEL = znrm2_sse.S
 endif
 
 ifndef ZNRM2KERNEL
+ifeq ($(OSNAME),WINNT)
+ZNRM2KERNEL = ../arm/znrm2.c
+else
 ZNRM2KERNEL = znrm2.S
 endif
+endif
 
 ifndef XNRM2KERNEL
 XNRM2KERNEL = znrm2.S