tk: upgrade 8.6.10 -> 8.6.15

Release Notes:
https://sourceforge.net/p/tcl/mailman/message/58817026/

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/tcltk/tk/confsearch.diff

@@ -7,9 +7,8 @@ Patch by Sergei Golovan allows to find tclConfig.sh in /usr/share/tcltk/tcl8.5
 and tkConfig.sh in /usr/share/tcltk/tk8.5 where they are located in Debian
 installation.
 
----
 Upstream-Status: Pending
-
+---
  unix/configure | 1 +
  unix/tcl.m4    | 2 ++
  2 files changed, 3 insertions(+)

meta-oe/recipes-devtools/tcltk/tk/tkprivate.diff

@@ -1,9 +1,9 @@
-Upstream-Status: Pending
-
 Patch by Chris Waters sets path which are normally point to a directory
 with Tk sources to a subdirectory of /usr/include/tcl8.4 (debian/rules
 puts private Tk headers there).
 
+Upstream-Status: Pending
+
 --- tk8.5-8.5.8.orig/unix/tkConfig.sh.in
 +++ tk8.5-8.5.8/unix/tkConfig.sh.in
 @@ -55,7 +55,7 @@

meta-oe/recipes-devtools/tcltk/tk_8.6.15.bb

@@ -23,8 +23,8 @@ SRC_URI = "\
     file://tkprivate.diff;striplevel=2 \
     file://fix-xft.diff \
 "
-SRC_URI[md5sum] = "602a47ad9ecac7bf655ada729d140a94"
+
-SRC_URI[sha256sum] = "63df418a859d0a463347f95ded5cd88a3dd3aaa1ceecaeee362194bc30f3e386"
+SRC_URI[sha256sum] = "550969f35379f952b3020f3ab7b9dd5bfd11c1ef7c9b7c6a75f5c49aca793fec"
 
 UPSTREAM_CHECK_URI = "https://sourceforge.net/projects/tcl/files/Tcl/"
 UPSTREAM_CHECK_REGEX = "Tcl/(?P<pver>\d+(\.\d+)+)/"