package/libnss: enable parallel building

Enable parallel building by substituting $(MAKE1) with $(MAKE) in
libnss.mk. Parallel Makefile building has been added after version 3.53
so now it's time to enable it in Buildroot to save building time.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libnss/libnss.mk

@@ -69,12 +69,12 @@ endif
 endif
 
 define LIBNSS_BUILD_CMDS
-	$(TARGET_CONFIGURE_OPTS) $(MAKE1) -C $(@D)/nss coreconf \
+	$(TARGET_CONFIGURE_OPTS) $(MAKE) -C $(@D)/nss coreconf \
 		SOURCE_MD_DIR=$(@D)/$(LIBNSS_DISTDIR) \
 		DIST=$(@D)/$(LIBNSS_DISTDIR) \
 		CHECKLOC= \
 		$(LIBNSS_BUILD_VARS)
-	$(TARGET_CONFIGURE_OPTS) $(MAKE1) -C $(@D)/nss lib/dbm all \
+	$(TARGET_CONFIGURE_OPTS) $(MAKE) -C $(@D)/nss lib/dbm all \
 		SOURCE_MD_DIR=$(@D)/$(LIBNSS_DISTDIR) \
 		DIST=$(@D)/$(LIBNSS_DISTDIR) \
 		CHECKLOC= \
@@ -127,12 +127,12 @@ HOST_LIBNSS_BUILD_VARS += USE_64=1
 endif
 
 define HOST_LIBNSS_BUILD_CMDS
-	$(HOST_CONFIGURE_OPTS) $(MAKE1) -C $(@D)/nss coreconf \
+	$(HOST_CONFIGURE_OPTS) $(MAKE) -C $(@D)/nss coreconf \
 		SOURCE_MD_DIR=$(@D)/$(LIBNSS_DISTDIR) \
 		DIST=$(@D)/$(LIBNSS_DISTDIR) \
 		CHECKLOC= \
 		$(HOST_LIBNSS_BUILD_VARS)
-	$(HOST_CONFIGURE_OPTS) $(MAKE1) -C $(@D)/nss lib/dbm all \
+	$(HOST_CONFIGURE_OPTS) $(MAKE) -C $(@D)/nss lib/dbm all \
 		SOURCE_MD_DIR=$(@D)/$(LIBNSS_DISTDIR) \
 		DIST=$(@D)/$(LIBNSS_DISTDIR) \
 		CHECKLOC= \