pcre: bump to 8.20

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/pcre/pcre.mk

@@ -4,7 +4,7 @@
 #
 #############################################################
 
-PCRE_VERSION = 7.9
+PCRE_VERSION = 8.20
 PCRE_SITE = ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre
 PCRE_INSTALL_STAGING = YES