Config: Globally permit using 32 bit time_t

This is required because some packages do not recommend building with
time_t when it is 32 bit (Y2038 problem).

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

lfs/Config

@@ -84,6 +84,11 @@ else
 	PREFIX = /usr
 endif
 
+# Permit building with 32 bit time_t on 32 bit architectures
+ifeq "$(IS_32BIT)" "1"
+	export TIME_T_32_BIT_OK = yes
+endif
+
 TAR_OPTIONS = \
 	--format=pax \
 	--acls \