We need to call rpmcliInit to ensure the rpm relocation code is called
and it correctly honours the relocation environmental variables.

when we export the wrsdk and source the sdk, then execute rpm2cpio xxx.rpm|cpio -t.
we will get the following error :
"rpm-5.4.14/rpmdb/dbconfig.c:493:
db3New: Assertion `dbOpts != ((void *)0) && *dbOpts != '\0'' failed.

Upstream-Status: Pending

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
Index: rpm-5.4.15/tools/rpm2cpio.c
===================================================================
--- rpm-5.4.15.orig/tools/rpm2cpio.c	2012-04-27 01:46:51.000000000 +0800
+++ rpm-5.4.15/tools/rpm2cpio.c	2016-09-05 11:07:30.419903338 +0800
@@ -87,6 +87,8 @@
 #endif
 	(void) rpmtsSetVSFlags(ts, vsflags);
 
+	rpmcliInit(argc, argv, NULL);
+
 	/*@-mustmod@*/      /* LCL: segfault */
 	rc = rpmReadPackageFile(ts, fdi, "rpm2cpio", &h);
 	/*@=mustmod@*/