add spdx headers to dependencies configs

these used to be separate scripts under gpl 3+, so it makes
sense to clarify the licensing situation

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

config/dependencies/arch

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="pacman -S --needed --noconfirm"
 pkglist=" \
 acpica arm-none-eabi-binutils arm-none-eabi-gcc arm-none-eabi-newlib \

config/dependencies/debian

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="apt-get -y install"
 pkglist=" \
 acpica-tools autoconf autogen automake autopoint autotools-dev bc \

config/dependencies/fedora38

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="dnf -y install"
 pkglist=" \
 acpica-tools arm-none-eabi-binutils arm-none-eabi-gcc \

config/dependencies/fedora40

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="dnf -y install"
 pkglist=" \
 acpica-tools arm-none-eabi-binutils arm-none-eabi-gcc \

config/dependencies/fedora41

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="dnf -y install"
 pkglist=" \
 acpica-tools arm-none-eabi-binutils arm-none-eabi-gcc arm-none-eabi-gcc-cs-c++ \

config/dependencies/parabola

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="pacman -S --needed --noconfirm"
 pkglist=" \
 acpica arm-none-eabi-binutils arm-none-eabi-gcc arm-none-eabi-newlib \

config/dependencies/trisquel

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="apt-get -y install"
 pkglist=" \
 autoconf autogen automake autopoint autotools-dev bc binutils-arm-none-eabi \

config/dependencies/ubuntu2004

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="apt-get -y install"
 pkglist=" \
 autoconf autogen automake autopoint autotools-dev bc binutils-arm-none-eabi \

config/dependencies/ubuntu2404

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="apt-get -y install"
 pkglist=" \
 autoconf autogen automake autopoint autotools-dev bc binutils-arm-none-eabi \

config/dependencies/void

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 pkg_add="xbps-install -y"
 pkglist=" \
 acpica-utils autogen base-devel bison cmake \