package/vala: bump to version 0.52.4

Update patch

This will fix the following build failure with gssdp 1.2.3 which is
raised since commit 7a2f73e9:

FAILED: vala/gssdp-1.2.vapi
/home/buildroot/autobuild/run/instance-1/output-1/host/bin/vapigen --quiet --library=gssdp-1.2 --directory=/home/buildroot/autobuild/run/instance-1/output-1/build/gssdp-1.2.3/build/vala --pkg=gio-2.0 --pkg=libsoup-2.4 --metadatadir=/home/buildroot/autobuild/run/instance-1/output-1/build/gssdp-1.2.3/vala /home/buildroot/autobuild/run/instance-1/output-1/build/gssdp-1.2.3/build/libgssdp/GSSDP-1.2.gir
GSSDP-1.2.gir:1656.5-1656.29: error: unknown child element `docsection' in `namespace'

https://github.com/GNOME/vala/blob/0.52.4/NEWS

Fixes:
 - http://autobuild.buildroot.org/results/e531029f75c8d6886f797b5bd01795d16f6848f3



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