json-c-0.13.x: Detect broken RDRAND during initialization.

(cherry picked from commit fe308b8862)

Some CPUs advertise RDRAND in CPUID, but return
0xFFFFFFFF unconditionally.  To avoid locking up
later, test RDRAND during initialization, and if
it returns 0xFFFFFFFF, mark it as nonexistent.

Also fix a possible segmentation fault in CPUID check.

This commit is a squashed and slightly modified backport
of the following commits on the master branch:

  * 0e5bbcaa16
  * 4d36b0287d
  * 8086314026

(cherry picked from commit 1c6086a86a)

json-c-0.13.x: Fix CVE-2020-12762 - json-c through 0.14 has an integer overflow and out-of-bounds write ...

This commit is a squashed backport of the following commits
on the master branch:

  * 099016b7e8
  * 77d935b7ae
  * d07b910149
  * 519dfe1591
  * a59d5acfab

When building the project using cmake then installing it.  The
definitions in `json_object_iterator.h` are required but not installed
by the cmake install rule.  This patch adds the `json_object_iterator.h`
file to the list of files to install.

Signed-off-by: Keith Holman <keith.holman@windriver.com>

When building the project using cmake then installing it.  The
definitions in `json_object_iterator.h` are required but not installed
by the cmake install rule.  This patch adds the `json_object_iterator.h`
file to the list of files to install.

Signed-off-by: Keith Holman <keith.holman@windriver.com>

arraylist: Fixed names of parameters for callback function

Fixed typos

Conflicts:
	ChangeLog

Conflicts:
	ChangeLog

Fix json_object_object_foreach to avoid uninitialized variable warnings
using ANSI C or MSC.

Add fuzzers from OSS-Fuzz

Avoid uninitialized variable warnings

Fix json_object_object_foreach to avoid uninitialized variable warnings
using ANSI C or MSC.

Also try to accomodate formats to explicitly exclude the decimal (e.g. %.0f).

Also try to accomodate formats to explicitly exclude the decimal (e.g. %.0f).

json_object_private: Use unsigned 32-bit integer type for refcount

json_object: Avoid invalid free (and thus a segfault) when ref_count gets < 0

This is recommended by the libtool manual.

json_object: Avoid double free (and thus a segfault) when ref_count gets < 0

json_object: Add const size_t json_c_object_sizeof()

Makefile: Add ACLOCAL_AMFLAGS

Fix non-GNUC define for JSON_C_CONST_FUNCTION