[google] AddressSanitizer for gcc, first attempt. (issue 5272048)

[dnovillo@google.com]

OK for google/main with the nits below.



http://codereview.appspot.com/5272048/diff/42003/ChangeLog.google-main
File ChangeLog.google-main (right):

http://codereview.appspot.com/5272048/diff/42003/ChangeLog.google-main#newcode1
ChangeLog.google-main:1: 2011-11-02   Kostya Serebryany
<kcc@google.com>
    1 2011-11-02   Kostya Serebryany  <kcc@google.com>

Need blank line below the datestamp.

http://codereview.appspot.com/5272048/diff/42003/ChangeLog.google-main#newcode3
ChangeLog.google-main:3: AddressSanitizer, a fast memory error detector:
     2         Introduce a new option -fasan which enables
     3         AddressSanitizer, a fast memory error detector:

Not strictly accepted, but it is common to add some verbiage of this
nature when adding major features.  OK.

http://codereview.appspot.com/5272048/