Update fedoramirror to archives.fedoraproject.org.
Add unset_var preload library from Richard K. Lloyd.

Overrides exec* functions so that LD_LIBRARY_PATH is unset before
chrome executes an external program.
Add modify_wrapper from Richard K. Lloyd.

Modifies chrome wrapper script to include preload of unset_var.so.
Update spec file to use unset_var preload module.

Install module and modify_wrapper script, and run modify_wrapper
script in %post.
chrome-deps 1.1-1
Intercept system() function as well.
chrome-deps 1.2-1