Changed php to only enable bip2 and zlib support if the libraries are installed

develop/php/php.conf

@@ -32,7 +32,14 @@ else
 	var_append extraconfopt " " "--enable-fastcgi"
 	var_append extraconfopt " " "--enable-force-cgi-redirect"
 fi
-var_append extraconfopt " " "--with-zlib --with-bz2"
+
+if pkginstalled zlib; then
+	var_append extraconfopt " " "--with-zlib"
+fi
+
+if pkginstalled bzip2; then
+	var_append extraconfopt " " "--with-bz2"
+fi
 
 if pkginstalled mysql; then
 	pkgprefix -t mysql