remove auto-confirm on distro dependencies

because if it says yes to everything, and the package
manager would otherwise ask whether you want to give
it your first born son, you are therefore agreeing to it.

so remove -y for safety

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/dependencies/debian

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-pkg_add="apt-get -y install"
+pkg_add="apt-get install"
 pkglist=" \
 acpica-tools autoconf autogen automake autopoint autotools-dev bc \
 binutils-arm-none-eabi bison build-essential cmake curl device-tree-compiler \