package/mesa3d: add optional support for libsha1

mesa3d supports several sha1 implementations:
https://cgit.freedesktop.org/mesa/mesa/tree/configure.ac?h=12.0#n1167

This patch adds support for libsha1, inspired by the
xserver_xorg-server package:
https://github.com/buildroot/buildroot/blob/master/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk#L247

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mesa3d/mesa3d.mk

@@ -36,6 +36,9 @@ MESA3D_CONF_OPTS += --with-sha1=libcrypto
 else ifeq ($(BR2_PACKAGE_LIBGCRYPT),y)
 MESA3D_DEPENDENCIES += libgcrypt
 MESA3D_CONF_OPTS += --with-sha1=libgcrypt
+else ifeq ($(BR2_PACKAGE_LIBSHA1),y)
+MESA3D_DEPENDENCIES += libsha1
+MESA3D_CONF_OPTS += --with-sha1=libsha1
 endif
 
 ifeq ($(BR2_PACKAGE_HAS_UDEV),y)