Fix update macros for gnutls and physfs

Fix "downdates" reported by Niels Kristian Bech Jensen for packages
gnutls and physfs by sorting version numbers properly and allowing
(in the case of gnutls) version number parts with more than one digit.

src/gnutls.mk

@@ -10,7 +10,8 @@ $(PKG)_DEPS     := gcc gettext nettle pcre zlib
 
 define $(PKG)_UPDATE
     $(WGET) -q -O- ftp://ftp.gnutls.org/gcrypt/gnutls/v3.1/ | \
-    $(SED) -n 's,.*gnutls-\([1-9]\.[0-9].[0-9]\)\..*,\1,p' | \
+    $(SED) -n 's,.*gnutls-\([1-9]\+\.[0-9]\+.[0-9]\+\)\..*,\1,p' | \
+    $(SORT) -V | \
     tail -1
 endef
 

src/physfs.mk

@@ -12,7 +12,8 @@ $(PKG)_DEPS     := gcc zlib
 define $(PKG)_UPDATE
     $(WGET) -q -O- 'http://icculus.org/physfs/downloads/?M=D' | \
     $(SED) -n 's,.*<a href="physfs-\([0-9][^"]*\)\.tar.*,\1,pI' | \
-    head -1
+    $(SORT) -V | \
+    tail -1
 endef
 
 define $(PKG)_BUILD