csl-versions.inc: instruct user to check local.conf

In case the compiler version cannot be extracted instruct user to check
that the toolchain supports MACHINE's architecture and that the latter
is set correctly in local.conf.

[YOCTO #4901]

(From OE-Core master rev: 0023188ec27404b8109ea92d7f7f23748aa62a46)

(From OE-Core rev: c3d71f0178212a4fe889bcc47e1d35327e858416)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/distro/include/csl-versions.inc

@@ -18,6 +18,7 @@ def csl_get_version(d):
 		stdout, stderr = csl_run(d, 'gcc', '-v')
 	except bb.process.CmdError as exc:
 		bb.error('Failed to obtain CodeSourcery toolchain version: %s' % exc)
+		bb.error('Make sure that MACHINE is set correctly in your local.conf and the toolchain supports %s.' % d.getVar("TARGET_ARCH", True))
 		return 'UNKNOWN'
 	else:
 		last_line = stderr.splitlines()[-1]