dev-manual, ref-manual: Added error reporting tool information

Fixes [YOCTO #1562]

In the dev-manual, I created a new section called "Using the
Error Reporting Tool" that describes how to use this feature.
The text was based on information I received from Andreea Proca.

In the ref-manual, I added a new variable entry for ERR_REPORT_DIR
in the glossary and a new report-error class in the class chapter.

(From yocto-docs rev: 70a5538fefcc1b77958fe4b2f29be00354f4137a)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/ref-manual/ref-classes.xml

@@ -2515,6 +2515,26 @@
     </para>
 </section>
 
+<section id='ref-classes-report-error'>
+    <title><filename>report-error.bbclass</filename></title>
+
+    <para>
+        The <filename>report-error</filename> class supports enabling the
+        <ulink url='&YOCTO_DOCS_DEV_URL;#using-the-error-reporting-tool'>error reporting tool</ulink>,
+        which allows you to submit build error information to a central
+        database.
+    </para>
+
+    <para>
+        The class collects debug information for recipe, recipe version, task,
+        machine, distro, build system, target system, host distro, branch,
+        commit, and log.
+        From the information, report files using a JSON format are created and
+        stored in
+        <filename>${</filename><link linkend='var-LOG_DIR'><filename>LOG_DIR</filename></link><filename>}/error-report</filename>.
+    </para>
+</section>
+
 <section id='ref-classes-rm-work'>
     <title><filename>rm_work.bbclass</filename></title>