protobuf-c: Bump version to 1.2.1.

Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>

libs/protobuf-c/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libprotobuf-c
-PKG_VERSION:=v1.0.1
+PKG_VERSION:=v1.2.1
 PKG_RELEASE:=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2