OS X codesign fix (e.g. --disable-python case)

Change-Id: Icf6b2b9722481492a2d8d70af9dbb34b04a40df7
Reviewed-on: https://gerrit.libreoffice.org/15779Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

solenv/bin/macosx-codesign-app-bundle

@@ -62,9 +62,12 @@ done
 
 for i in gengal python senddoc unoinfo
 do
-    codesign --verbose --identifier="$MACOSX_BUNDLE_IDENTIFIER.$i" \
-        --sign "$MACOSX_CODESIGNING_IDENTITY" "$APP_BUNDLE/Contents/MacOS/$i" \
-    || exit 1
+    if [ -f "$APP_BUNDLE/Contents/MacOS/$i" ]
+    then
+        codesign --verbose --identifier="$MACOSX_BUNDLE_IDENTIFIER.$i" \
+            --sign "$MACOSX_CODESIGNING_IDENTITY" "$APP_BUNDLE/Contents/MacOS/$i" \
+        || exit 1
+    fi
 done
 
 # Sign frameworks.