package/nfs-utils: fix nfs-utils_env.sh path

Per upstream commit bf12e1fa9f48e8ee91a2869e69484c70595b5160
https://cdn.kernel.org/pub/linux/utils/nfs-utils/1.3.4/1.3.4-Changelog

Currently nfs-utils_env.sh is installed in a
directory that is own by systemd. They requested
via https://bugzilla.redhat.com/show_bug.cgi?id=1303113
to move the script into /usr/libexec/nfs-utils

As such we must update the installation path for nfs-utils_env.sh.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Tested-by: Carlos Santos <unixmania@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 74aab4ae06cb29ca93cf36f0e5956290ede785e6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/nfs-utils/nfs-utils.mk

@@ -93,7 +93,7 @@ define NFS_UTILS_INSTALL_INIT_SYSTEMD
 		$(TARGET_DIR)/etc/systemd/system/remote-fs.target.wants/nfs-client.target
 
 	$(INSTALL) -D -m 0755 package/nfs-utils/nfs-utils_env.sh \
-		$(TARGET_DIR)/usr/lib/systemd/scripts/nfs-utils_env.sh
+		$(TARGET_DIR)/usr/libexec/nfs-utils/nfs-utils_env.sh
 
 	$(INSTALL) -D -m 0644 package/nfs-utils/nfs-utils_tmpfiles.conf \
 		$(TARGET_DIR)/usr/lib/tmpfiles.d/nfs-utils.conf