Trac #16345: ATLAS fails to build on ARM

A whitespace is missing before `-D c -DATL_ARM_HARDFP=1` in `spkg-
install`.

URL: http://trac.sagemath.org/16345
Reported by: jpflori
Ticket author(s): Jean-Pierre Flori
Reviewer(s): Volker Braun, Peter Bruin

build/pkgs/atlas/spkg-install

@@ -329,7 +329,7 @@ def configure(arch=None, isa_ext=None):
 
     # use hard floats on ARM
     if conf['ARM?']:
-        cmd += '-D c -DATL_ARM_HARDFP=1'
+        cmd += ' -D c -DATL_ARM_HARDFP=1'
 
     # set machine architecture
     if arch is not None: