Make apm symlink relative for rpm spec

resources/linux/redhat/atom.spec.in

@@ -13,7 +13,7 @@ AutoReqProv:    no # Avoid libchromiumcontent.so missing dependency
 mkdir -p %{buildroot}/usr/local/share/atom
 cp -r /tmp/atom-build/Atom/* %{buildroot}/usr/local/share/atom
 mkdir -p %{buildroot}/usr/local/bin/
-ln -sf /usr/local/share/atom/resources/app/apm/node_modules/.bin/apm %{buildroot}/usr/local/bin/apm
+ln -sf ../share/atom/resources/app/apm/node_modules/.bin/apm %{buildroot}/usr/local/bin/apm
 cp atom.sh %{buildroot}/usr/local/bin/atom
 chmod 755 atom.sh
 mkdir -p %{buildroot}/usr/local/share/applications/