[gimp] desktop, po: also update the appdata description.

[Jehan Pagès <jehanp src gnome org>]

commit 6a825f18bbf48af9075487c03e87539baa3a5f55
Author: Jehan <jehan girinstud io>
Date:   Sun Mar 25 14:44:42 2018 +0200

    desktop, po: also update the appdata description.
    
    GIMP 2.10 is 2.10.0 and "2.10 RC1" is "2.10.0-RC1".
    I also update directly the Polish msgid and msgstr (only language having
    a translation on time, though it's our fault!) to avoid the translation
    getting fuzzy uselessly.
    I let the "rc" as lowercase in version property of <release> tag,
    assuming the more official/parsable name should be lowercase. Not sure
    if it makes sense.

 desktop/org.gimp.GIMP.appdata.xml.in.in |    4 ++--
 po/pl.po                                |    6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/desktop/org.gimp.GIMP.appdata.xml.in.in b/desktop/org.gimp.GIMP.appdata.xml.in.in
index beb00df..fa0e482 100644
--- a/desktop/org.gimp.GIMP.appdata.xml.in.in
+++ b/desktop/org.gimp.GIMP.appdata.xml.in.in
@@ -124,8 +124,8 @@
     <release version="2.10.0-rc1" date="2018-03-25" type="development">
       <description>
         <_p>
-        GIMP 2.10 RC1 is the first release candidate before GIMP 2.10
-        stable release, with a focus on debugging and stability.
+        GIMP 2.10.0-RC1 is the first release candidate before GIMP
+        2.10.0 stable release, with a focus on debugging and stability.
         Other than the many bug fixes, most notable improvements are:
         </_p>
         <ul>
diff --git a/po/pl.po b/po/pl.po
index fbf7bda..9d6f990 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -88,12 +88,12 @@ msgstr "Obróbka zdjęć w GIMP-ie"
 
 #: ../desktop/org.gimp.GIMP.appdata.xml.in.in.h:8
 msgid ""
-"GIMP 2.10 RC1 is the first release candidate before GIMP 2.10 stable "
+"GIMP 2.10.0-RC1 is the first release candidate before GIMP 2.10.0 stable "
 "release, with a focus on debugging and stability. Other than the many bug "
 "fixes, most notable improvements are:"
 msgstr ""
-"GIMP 2.10 RC1 to pierwsze wydanie kandydackie przed stabilnym wydaniem GIMP "
-"2.10, skupiające się na debugowaniu i stabilności. Oprócz wielu poprawek "
+"GIMP 2.10.0-RC1 to pierwsze wydanie kandydackie przed stabilnym wydaniem GIMP "
+"2.10.0, skupiające się na debugowaniu i stabilności. Oprócz wielu poprawek "
 "błędów najważniejsze ulepszenia to:"
 
 #: ../desktop/org.gimp.GIMP.appdata.xml.in.in.h:9