package/protobuf-c: bump to version 1.5.2

Release notes:
https://github.com/protobuf-c/protobuf-c/releases/tag/v1.5.2

Signed-off-by: Kadambini Nema <kadambini.nema@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/protobuf-c/protobuf-c.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  20d1dc257da96f8ddff8be4dd9779215bbd0a6069ed53bbe9de38fa7629be06b  protobuf-c-1.5.1.tar.gz
+sha256  e2c86271873a79c92b58fef7ebf8de1aa0df4738347a8bd5d4e65a80a16d0d24  protobuf-c-1.5.2.tar.gz
 sha256  2d1d028bd27f8c85bc970d720519d2069ca6213fcb26b9dea444a7c39d24bbb3  LICENSE

package/protobuf-c/protobuf-c.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PROTOBUF_C_VERSION = 1.5.1
+PROTOBUF_C_VERSION = 1.5.2
 PROTOBUF_C_SITE = https://github.com/protobuf-c/protobuf-c/releases/download/v$(PROTOBUF_C_VERSION)
 PROTOBUF_C_DEPENDENCIES = host-protobuf-c
 HOST_PROTOBUF_C_DEPENDENCIES = host-protobuf host-pkgconf