Cleanup: use $startdir when referencing relative path aports APKBUILD files

community/java-gcj-compat/APKBUILD

@@ -18,8 +18,8 @@ makedepends="gcc6-java=$_gccver-r$_gccpkgrel zlib-dev"
 
 prepare() {
 	(
-	gccver=$(. ../../community/gcc6/APKBUILD ; echo "$pkgver")
-	gccpkgrel=$(. ../../community/gcc6/APKBUILD ; echo "$pkgrel")
+	gccver=$(. "$startdir"/../../community/gcc6/APKBUILD ; echo "$pkgver")
+	gccpkgrel=$(. "$startdir"/../../community/gcc6/APKBUILD ; echo "$pkgrel")
 	if [ "$gccver" != "$_gccver" ] || [ "$gccpkgrel" != "$_gccpkgrel" ]; then
 		die "gcc6 version ($gccver) needs to match _gccver ($_gccver)"
 	fi

main/dahdi-linux-lts/APKBUILD

@@ -41,7 +41,7 @@ builddir="$srcdir/$_name-$_ver"
 prepare() {
 	default_prepare
 	# verify the kernel version
-	local _kapkbuild=../../main/linux-$_flavor/APKBUILD
+	local _kapkbuild="$startdir"/../../main/linux-$_flavor/APKBUILD
 	if [ -f $_kapkbuild ]; then
 		(	. $_kapkbuild
 			pkgname=$_name-$_flavor

main/xtables-addons-lts/APKBUILD

@@ -30,7 +30,7 @@ options="!check"
 
 prepare() {
 	default_prepare
-	local _kapkbuild=../../main/linux-$_flavor/APKBUILD
+	local _kapkbuild="$startdir"/../../main/linux-$_flavor/APKBUILD
 	if [ -f $_kapkbuild ]; then
 		(	. $_kapkbuild
 			pkgname=$_name-$_flavor

main/zfs-lts/APKBUILD

@@ -51,7 +51,7 @@ done
 prepare() {
 	default_prepare
 	# verify the kernel version
-	local _kapkbuild=../../main/linux-$_flavor-/APKBUILD
+	local _kapkbuild="$startdir"/../../main/linux-$_flavor-/APKBUILD
 	if [ -f $_kapkbuild ]; then
 		(	. $_kapkbuild
 			pkgname=$_name-$_flavor

main/zfs-rpi/APKBUILD

@@ -49,7 +49,7 @@ done
 prepare() {
 	default_prepare
 	# verify the kernel version
-	local _kapkbuild=../../main/linux-$_flavor-/APKBUILD
+	local _kapkbuild="$startdir"/../../main/linux-$_flavor-/APKBUILD
 	if [ -f $_kapkbuild ]; then
 		(	. $_kapkbuild
 			pkgname=$_name-$_flavor