patch 8.0.1400: color scheme check script shows up as color scheme

Problem:    Color scheme check script shows up as color scheme.
Solution:   Move it to the "tools" subdirectory. (closes #2457)

Filelist

@@ -666,6 +666,7 @@ RT_SCRIPTS =	\
 		runtime/autoload/xml/*.vim \
 		runtime/colors/*.vim \
 		runtime/colors/README.txt \
+		runtime/colors/tools/*.vim \
 		runtime/compiler/*.vim \
 		runtime/compiler/README.txt \
 		runtime/indent/*.vim \

runtime/colors/README.txt

@@ -64,7 +64,7 @@ Search for "highlight_init".
 If you think you have a color scheme that is good enough to be used by others,
 please check the following items:
 
-- Source the check_colors.vim script to check for common mistakes.
+- Source the tools/check_colors.vim script to check for common mistakes.
 - Does it work in a color terminal as well as in the GUI?
 - Is "g:colors_name" set to a meaningful value?  In case of doubt you can do
   it this way:

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1400,
 /**/
     1399,
 /**/