main/postmarketos-dev: new aport

This package is meant to encompass what an average developer would want from a postmarketOS image. We plan to provide -dev variants of some postmarketOS images for some devices for use by the Linux mobile developer community. These should include useful tools out of the box and provide a familiar shell and coreutils.

@craftyguy note: I didn't have any hand in creating this patch, I just picked it from the master_staging_systemd branch and submitted it here (after talking with @calebccff) separately from that branch. Please direct all reviews/comments to them :D

main/postmarketos-dev/APKBUILD

+# Maintainer: Caleb Connolly <caleb@postmarketos.org>
+pkgname=postmarketos-dev
+pkgver=1
+pkgrel=0
+pkgdesc="postmarketOS development tools"
+url="https://postmarketos.org"
+arch="noarch"
+license="MIT"
+options="!check"
+depends="
+	htop
+	coreutils
+	nano
+	psutils
+	iputils
+	alpine-sdk
+	findutils
+	gawk
+	bash
+	bash-completion
+"
+install="$pkgname.post-install $pkgname.post-deinstall"
+
+package() {
+	mkdir -p "$pkgdir/etc/skel"
+	cat > "$pkgdir/etc/skel/.bashrc" <<EOF
+# Just set a nice prompt
+PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
+EOF
+
+	cat > "$pkgdir/etc/skel/.bash_profile" <<EOF
+# Source the users bashrc (global one is sourced by /etc/profile.d/00-bashrc.sh)
+[[ -f ~/.bashrc ]] && . ~/.bashrc
+EOF
+}