package/php-yaml: bump to version 2.0.4

This bump fix build with php 7.3.0
Also add hash for license file

Fixes:
 - http://autobuild.buildroot.org/results/8d23d9c1b30d104d44ab82475dd12f1c4ab1e125

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/php-yaml/php-yaml.hash

@@ -1,2 +1,3 @@
 # Locally calculated
-sha256 c3afb0dad47b6c3a5b7b449f57a4938df27bf974efbe188d85c4fb998eff0039  yaml-2.0.2.tgz
+sha256 9786b0386e648f12cc18a038358bd57bee4906e350a2e9ab776d6a5f18fc6680  yaml-2.0.4.tgz
+sha256 68d9700294396c72089bfc7bf38a5b3654a53ae415f3bd37768848c14e86f338  LICENSE

package/php-yaml/php-yaml.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PHP_YAML_VERSION = 2.0.2
+PHP_YAML_VERSION = 2.0.4
 PHP_YAML_SOURCE = yaml-$(PHP_YAML_VERSION).tgz
 PHP_YAML_SITE = https://pecl.php.net/get
 PHP_YAML_CONF_OPTS = --with-php-config=$(STAGING_DIR)/usr/bin/php-config \