m4: update to 1.4.21

package/m4/Makefile

@@ -4,9 +4,9 @@
 include ${ADK_TOPDIR}/rules.mk
 
 PKG_NAME:=		m4
-PKG_VERSION:=		1.4.20
+PKG_VERSION:=		1.4.21
 PKG_RELEASE:=		1
-PKG_HASH:=		e236ea3a1ccf5f6c270b1c4bb60726f371fa49459a8eaaebc90b216b328daf2b
+PKG_HASH:=		f25c6ab51548a73a75558742fb031e0625d6485fe5f9155949d6486a2408ab66
 PKG_DESCR:=		macro processor
 PKG_SECTION:=		dev/tools
 PKG_BUILDDEP:=		m4-host