aaudio: add +x to scripts for monitoring CPU rails

Test: python media/libaaudio/scripts/setup_odpm_cpu_rails.sh
Change-Id: I5d48033ef9430d96aa178232dfded1539209d85a
diff --git a/media/libaaudio/scripts/setup_odpm_cpu_rails.sh b/media/libaaudio/scripts/setup_odpm_cpu_rails.sh
old mode 100644
new mode 100755