sstatesig/find_siginfo: special-case gcc-source when looking in sstate caches

This is already done for local stamps just above, and will allow enabling
the full selftest that compares gcc-source signatures via printdiff
(that is, both local stamp and sstate variants).

(From OE-Core rev: 29775b5ecfc8d811293962f050fcfc3b3ad7efde)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/sstatesig.py

@@ -398,6 +398,9 @@ def find_siginfo(pn, taskname, taskhashlist, d):
             localdata.setVar('TARGET_VENDOR', '*')
             localdata.setVar('TARGET_OS', '*')
             localdata.setVar('PN', pn)
+            # gcc-source is a special case, same as with local stamps above
+            if pn.startswith("gcc-source"):
+                localdata.setVar('PN', "gcc")
             localdata.setVar('PV', '*')
             localdata.setVar('PR', '*')
             localdata.setVar('BB_TASKHASH', hashval)