ads2gas.pl: convert push/pop and whole keywords.

This change converts push to stmdb and pop to ldmia. In addition word boundaries
are obeyed using \b avoiding substituion where not appropriate.

Patch provided by ihf@chromium.org.

TEST=Used on many Daisy assembly files.
BUG=None.

Change-Id: Ie5b197b158edd0467294551d0b640c8db6530d95
1 file changed