Build for i686 for accelerated functions goodness

Signed-off-by: Carsten Munk <carsten.munk@jollamobile.com>

glibc.changes

 * Sat Dec 13 2014 Carsten Munk <carsten.munk@jolla.com> - 2.19
 - Disable special -march=i486 for glibc
 - Use correct release. Release is mungled on OBS 
+- Build for i686 for accelerated functions goodness
 
 * Fri Dec 5 2014 Davide Bettio <davide.bettio@ispirata.com> - 2.19
 - Upgrade to eglibc_2.19-0ubuntu6.4 (security fixes)

glibc.spec

@@ -82,8 +82,12 @@ BuildRequires: gcc >= 3.2
 %ifarch i386
 %define nptl_target_cpu i486
 %else
+%ifarch i486
+%define nptl_target_cpu i686
+%else
 %define nptl_target_cpu %{_target_cpu}
 %endif
+%endif
 
 # Need AS_NEEDED directive
 # Need --hash-style=* support