utilize "/usr/bin/env perl" in perl scripts

When utilizing /usr/bin/perl, this expands to the full path of your
filesystem build. i.e. something like this:

/home/andrewg/Code/openbmc/build/witherspoon/tmp/work/x86_64-linux/mrw-perl-tools-native/1.0+gitAUTOINC+65ca8e19c4-r1/recipe-sysroot-native/usr/bin/perl

This now exceeds the allowed size by yocto:
"maximum shebang size exceeded, the maximum size is 128."

There are ways to disable this check in yocto, and we probably have a
case to argue this upstream, but our use in OpenBMC of perl is pretty
limited so the easiest solution is to just move the perl scripts over to
using /usr/bin/env. Half the perl scripts in this repo already do this.

Tested:
- Verified new yocto now builds this repo

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I1c6dfc49a9a1d5ace0d0b9fdd4fa7a0abdee033e
9 files changed