scripts/check_format: use git to find text files

Use 'git grep -I' to determine the list of files that git considers to be
text (rather than hardcoding a list of known text file extensions) and
check all of them for newline at end of file.

Change-Id: I9b947176af2792c139a2782856e3c41061e18f10
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>

scripts/check_format.sh

@@ -30,7 +30,7 @@ else
 	exit 0
 fi
 
-git ls-files -z '*.c' '*.cpp' '*.h' '*.txt' '*.md' '*.mk' '*.txt' '*.sh' '*.py' | \
+git grep -I -l -e . -z | \
 	xargs -0 -P8 -n1 scripts/eofnl
 
 exit 0