Made scripts executable

scripts/cells.pl

diff --git a/scripts/cells.pl b/scripts/cells.pl
old mode 100644
new mode 100755

scripts/drcexpander.pl

diff --git a/scripts/drcexpander.pl b/scripts/drcexpander.pl
old mode 100644
new mode 100755

scripts/feedback2mag.pl

diff --git a/scripts/feedback2mag.pl b/scripts/feedback2mag.pl
old mode 100644
new mode 100755

scripts/generator.pl

diff --git a/scripts/generator.pl b/scripts/generator.pl
old mode 100644
new mode 100755

scripts/gitpush.sh

diff --git a/scripts/gitpush.sh b/scripts/gitpush.sh
old mode 100644
new mode 100755

scripts/placement.pl

diff --git a/scripts/placement.pl b/scripts/placement.pl
old mode 100644
new mode 100755

scripts/removeDRCcells.pl

diff --git a/scripts/removeDRCcells.pl b/scripts/removeDRCcells.pl
old mode 100644
new mode 100755

scripts/testgen.pl

diff --git a/scripts/testgen.pl b/scripts/testgen.pl
old mode 100644
new mode 100755

scripts/viewer.pl

diff --git a/scripts/viewer.pl b/scripts/viewer.pl
old mode 100644
new mode 100755