Regenerate Makefile.in with private headers excluded from install.

Makefile.in

@@ -86,8 +86,8 @@ DIST_COMMON = INSTALL NEWS README AUTHORS ChangeLog \
 	$(top_srcdir)/configure $(am__configure_deps) \
 	$(srcdir)/config.h.in $(srcdir)/json_config.h.in \
 	$(srcdir)/json-c.pc.in $(srcdir)/json-c-uninstalled.pc.in \
-	depcomp $(libjson_cinclude_HEADERS) COPYING compile \
-	config.guess config.sub install-sh missing ltmain.sh
+	depcomp $(libjson_cinclude_HEADERS) $(noinst_HEADERS) COPYING \
+	compile config.guess config.sub install-sh missing ltmain.sh
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps =  \
 	$(top_srcdir)/autoconf-archive/m4/ax_append_compile_flags.m4 \
@@ -197,7 +197,7 @@ am__can_run_installinfo = \
     *) (install-info --version) >/dev/null 2>&1;; \
   esac
 DATA = $(pkgconfig_DATA)
-HEADERS = $(libjson_cinclude_HEADERS)
+HEADERS = $(libjson_cinclude_HEADERS) $(noinst_HEADERS)
 RECURSIVE_CLEAN_TARGETS = mostlyclean-recursive clean-recursive	\
   distclean-recursive maintainer-clean-recursive
 am__recursive_targets = \
@@ -402,17 +402,19 @@ libjson_cinclude_HEADERS = \
 	json_inttypes.h \
 	json_object.h \
 	json_object_iterator.h \
-	json_object_private.h \
 	json_pointer.h \
 	json_tokener.h \
 	json_util.h \
 	json_visit.h \
 	linkhash.h \
+	printbuf.h
+
+noinst_HEADERS = \
+	json_object_private.h \
 	math_compat.h \
 	strdup_compat.h \
 	snprintf_compat.h \
 	vasprintf_compat.h \
-	printbuf.h \
 	random_seed.h \
 	strerror_override.h