classes/buildhistory: handle packaged files with names containing spaces

The FILELIST field of the package info file in the buildhistory
repository is a space-separated list of all of the files in the package.
If a name of a file packaged by a recipe contains a space character then
of course the result was that we didn't handle its name properly. To fix
that, use quotes around any filename containing spaces and at the other
end use these quotes to extract the proper entries.

Fixes [YOCTO #12742].

(From OE-Core rev: 801b705957dc683030d11393f43407d0b3506b6a)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/buildhistory.bbclass

@@ -77,6 +77,7 @@ python buildhistory_emit_pkghistory() {
 
     import re
     import json
+    import shlex
     import errno
 
     pkghistdir = d.getVar('BUILDHISTORY_DIR_PACKAGE')
@@ -287,7 +288,7 @@ python buildhistory_emit_pkghistory() {
         dictval = json.loads(val)
         filelist = list(dictval.keys())
         filelist.sort()
-        pkginfo.filelist = " ".join(filelist)
+        pkginfo.filelist = " ".join([shlex.quote(x) for x in filelist])
 
         pkginfo.size = int(pkgdata['PKGSIZE'])