Check for bash-like "for"

We are currently failing in devsatck with "do not on same line as for"
when running over some embedded awk scripts.

Bash for loops are like "for i ..." or "for ((" (note double
parenthesis) while awk loops are "for (" (note single parenthesis).
So if we see a "for" followed by a single parenthesis, filter it out
on the assumption it's an awk script.

Change-Id: I7e9f6752db09ea07e91ee240ebbcbc3275709b60