Merge pull request #396 from Contra/patch-1

update openblas version to 0.1alpa2.5 to fix nehalem CPUs

Author: StefanKarpinski

external/Makefile

@@ -5,7 +5,7 @@ READLINE_VER = 6.2
 PCRE_VER = 8.21
 GRISU_VER = 1.1
 DSFMT_VER = 2.1
-OPENBLAS_VER = v0.1alpha2.4
+OPENBLAS_VER = v0.1alpha2.5
 LAPACK_VER = 3.4.0
 ARPACK_VER = 3.0.2
 FFTW_VER = 3.3