automake_1.11.1.bb: Don't try to execute perl.

automake_1.11.1.bb: Don't try to execute perl.

checking for perl... (cached) /bin/perl
/mnt/oe/tmp/work/mipsel-oe-linux-uclibc/automake-1.11.1-r3.1/automake-1.11.1/configure: line 2306: /bin/perl: No such file or directory
configure: error: perl 5.6 or better is required; perl 5.8.2 or better
is recommended.  If you have several perl versions
installed, select the one Automake should use using
  ./configure PERL=/path/to/perl

Signed-off-by: Graham Gower <graham.gower@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>