package/lapack: bump version to 3.7.1

lapack does not support in-source builds anymore:
https://github.com/Reference-LAPACK/lapack/commit/ea081254b4a0538f81c74bdb8338b29a068303aa

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/lapack/lapack.hash

@@ -1,2 +1,2 @@
 # Locally computed:
-sha256  888a50d787a9d828074db581c80b2d22bdb91435a673b1bf6cd6eb51aa50d1de  lapack-3.6.1.tgz
+sha256 f6c53fd9f56932f3ddb3d5e24c1c07e4cd9b3b08e7f89de9c867125eecc9a1c8  lapack-3.7.1.tgz

package/lapack/lapack.mk

@@ -4,12 +4,13 @@
 #
 ################################################################################
 
-LAPACK_VERSION = 3.6.1
+LAPACK_VERSION = 3.7.1
 LAPACK_SOURCE = lapack-$(LAPACK_VERSION).tgz
 LAPACK_LICENSE = BSD-3-Clause
 LAPACK_LICENSE_FILES = LICENSE
 LAPACK_SITE = http://www.netlib.org/lapack
 LAPACK_INSTALL_STAGING = YES
+LAPACK_SUPPORTS_IN_SOURCE_BUILD = NO
 LAPACK_CONF_OPTS = -DLAPACKE=ON -DCBLAS=ON
 
 ifeq ($(BR2_PACKAGE_LAPACK_COMPLEX),y)