Merge "Typos in envsetup.sh."

- sgrep:     Greps on all local source files.

- godir:     Go to the directory containing a file.

Environemnt options:

Environment options:

- SANITIZE_HOST: Set to 'true' to use ASAN for all host modules. Note that

                 ASAN_OPTIONS=detect_leaks=0 will be set by default until the

                 build is leak-check clean.

	adb root;

	adb wait-for-device;

	echo "Remounting root parition read-write...";

	echo "Remounting root partition read-write...";

	adb shell mount -w -o remount -t rootfs rootfs;

	sleep 1;

	adb wait-for-device;