Fix binary regex syntax errors

[GoogleCodeExporter]

I'm receiving syntax errors in some of the checks which use 
`binary_matches_string_grep`. For example, running a check from 
lib/checks/privileged_arguments manually:

 sh-4.3$ y="`binary_matches_string_grep \"/tmp/foo\" \"\$[\{]*[[:digit:]][\}]*\"`"
 sh: \{: syntax error: operand expected (error token is "\{")

Patch attached.

It seems to me that the privileged_environment_variables check will alert for 
any script using $-style variables, not necessarily environment variables. So, 
I'm a bit concerned as to how noisy it will be.

Original issue reported on code.google.com by JJC...@googlemail.com on 2 Mar 2015 at 11:53

Attachments:

• binary_grep_syntax.diff