dev-manual: Edits to add more detail to where patch files are

Updated some text to indicate that you should put patch files
in $BP, $BPN, or "files."  Also, added more on how the patch
files suffix is (i.e. accounting for compressed suffix names
like diff.bz).

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
(From yocto-docs rev: d9e23da24e9d86ec5e2b9d4067667478f3e56ba1)

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

documentation/dev-manual/dev-manual-common-tasks.xml

@@ -1935,7 +1935,9 @@
                 fetched.
                 Any files mentioned in <filename>SRC_URI</filename> whose
                 names end in <filename>.patch</filename> or
-                <filename>.diff</filename> are treated as patches.
+                <filename>.diff</filename> or compressed versions of these
+                suffixes (e.g. <filename>diff.gz</filename> are treated as
+                patches.
                 The
                 <ulink url='&YOCTO_DOCS_REF_URL;#ref-tasks-patch'><filename>do_patch</filename></ulink>
                 task automatically applies these patches.
@@ -1959,7 +1961,9 @@
                 using <filename>file://</filename>, you should place
                 patch files in a directory next to the recipe either
                 named the same as the base name of the recipe
-                (<ulink url='&YOCTO_DOCS_REF_URL;#var-BPN'><filename>BPN</filename></ulink>),
+                (<ulink url='&YOCTO_DOCS_REF_URL;#var-BP'><filename>BP</filename></ulink>
+                and
+                <ulink url='&YOCTO_DOCS_REF_URL;#var-BPN'><filename>BPN</filename></ulink>)
                 or "files".
             </para>
         </section>