eglibc-scripts: don't package mtrace, RDEPEND on eglibc-mtrace instead, fix RDEPENDS

eglibc-scripts: don't package mtrace, RDEPEND on eglibc-mtrace instead, fix RDEPENDS

* eglibc-mtrace and eglibc-scripts provide the same mtrace script
* remove mtrace from eglibc-scripts and replace it with RDEPENDS
* mtrace also needs perl (eglibc-mtrace has correct RDEPENDS), bash is
  for sotruss and xtrace
* remove invalid RDEPENDS_ldd, ldd is now using /bin/sh and is not
  packaged by eglibc-scripts
* fixes error in world-image build:
  * check_data_file_clashes: Package eglibc-mtrace wants to install file
    rootfs/usr/bin/mtrace
    But that file is already provided by package  * eglibc-scripts

(From OE-Core rev: a3599db48576043d7c335aff677471fc1afed8ab)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>