rename macro in preparation for openblas build

arpack.spec

@@ -71,13 +71,13 @@ autoreconf -vif
 %build
 export F77=gfortran
 %if 0%{?fedora} || 0%{?rhel} >= 7
-%global atlaslib -L%{_libdir}/atlas -ltatlas
+%global blaslib -L%{_libdir}/atlas -ltatlas
 %else
-%global atlaslib -L%{_libdir}/atlas -lf77blas -latlas
+%global blaslib -L%{_libdir}/atlas -lf77blas -latlas
 %endif
 %configure --enable-shared --enable-static \
-    --with-blas="%{atlaslib}" \
+    --with-blas="%{blaslib}" \
-    --with-lapack="%{atlaslib}"
+    --with-lapack="%{blaslib}"
 %make_build