json|jsonrpc-c: fix detection of json-c lib

(cherry picked from commit c290e58b7f50bdd7f9d691c4890baf1c9f74cb0d)
(cherry picked from commit 59f1bb0a700a5b8d39ac56b76dc640a08fec86dc)

modules/json/Makefile

@@ -14,7 +14,7 @@ BUILDER = $(shell which pkg-config)
 ifeq ($(BUILDER),)
 	JSONC=$(shell ls $(SYSBASE)/include/lib/libjson*.so $(LOCALBASE)/lib/libjson*.so 2>/dev/null | grep json-c)
 else
-	JSONC=$(shell pkg-config --libs json-c 2>/dev/null | grep json-c.so)
+	JSONC=$(shell pkg-config --libs json-c 2>/dev/null | grep json-c)
 endif
 
 ifneq ($(JSONC),)

modules/jsonrpc-c/Makefile

@@ -14,7 +14,7 @@ BUILDER = $(shell which pkg-config)
 ifeq ($(BUILDER),)
 	JSONC=$(shell ls $(SYSBASE)/include/lib/libjson*.so $(LOCALBASE)/lib/libjson*.so 2>/dev/null | grep json-c)
 else
-	JSONC=$(shell pkg-config --libs json-c 2>/dev/null | grep json-c.so)
+	JSONC=$(shell pkg-config --libs json-c 2>/dev/null | grep json-c)
 endif
 
 ifneq ($(JSONC),)