main/gptfdisk: modernize

Also removes the executable flag from the man pages

main/gptfdisk/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=gptfdisk
 pkgver=1.0.10
-pkgrel=0
+pkgrel=1
 pkgdesc="Text-mode partitioning tool that works on Globally Unique Identifier (GUID) Partition Table (GPT) disks"
 arch="all"
 url="https://www.rodsbooks.com/gdisk"
@@ -22,11 +22,8 @@ build() {
 }
 
 package() {
-	mkdir -p "$pkgdir"/usr/bin "$pkgdir"/usr/share/man/man8
-	local i; for i in gdisk cgdisk sgdisk fixparts; do
-		install $i "$pkgdir"/usr/bin/
-		install $i.8 "$pkgdir"/usr/share/man/man8/
-	done
+	install -Dm0644 -t "$pkgdir"/usr/share/man/man8 ./*.8
+	install -Dm0755 -t "$pkgdir"/usr/bin gdisk cgdisk sgdisk fixparts
 }
 
 check() {
@@ -35,8 +32,8 @@ check() {
 
 sgdisk() {
 	pkgdesc="Command-line GUID partition table (GPT) manipulator"
-	mkdir -p "$subpkgdir"/usr/bin
-	mv "$pkgdir"/usr/bin/sgdisk "$subpkgdir"/usr/bin/
+
+	amove usr/bin/sgdisk
 }
 
 sha512sums="