samples: Do not attempt to clean line endings for *.py DO NOT MERGE

The line endings script changes line endings, but also
removes the executable permissions of the files. We don't
want this to happen for scripts such as systrace.py

(cherry picked from commit de3fa5df)

Change-Id: Icee78118d0d7367176e8561338ae547228ee087d

build/tools/sdk_clean.sh

 #!/bin/bash
 #
-# This script processes a set of files given as arguments as sample code to be  released
-# in the SDK.
-#
+# This script cleans up a set of files given as arguments for release in the SDK
 # Note that these files are modified in-place.
 #
 
@@ -32,7 +30,7 @@ find $DIR -name "*.java" -o -name "*.xml" | xargs -n 1 \
 fi
 
 #
-# Fix up the line endings of all text files
+# Fix up the line endings of all text files. This also removes executable permissions.
 #
 if [ $HOST_OS = windows ] ; then
     ENDING_TYPE=dos
@@ -40,9 +38,8 @@ else
     ENDING_TYPE=unix
 fi
 find $DIR -name "*.aidl" -o -name "*.css" -o -name "*.html" -o -name "*.java" \
-                     -o -name "*.js" -o -name "*.prop" -o -name "*.py" \
-                     -o -name "*.template" -o -name "*.txt" -o -name "*.windows" \
-                     -o -name "*.xml" \
+                     -o -name "*.js" -o -name "*.prop" -o -name "*.template" \
+                     -o -name "*.txt" -o -name "*.windows" -o -name "*.xml" \
         | xargs $HOST_OUT_EXECUTABLES/line_endings $ENDING_TYPE