testing/gdal: add libexpat support

testing/gdal/APKBUILD

@@ -2,12 +2,11 @@
 # Maintainer: Trevor R.H. Clarke <trevor@notcows.com>
 pkgname=gdal
 pkgver=2.4.0
-pkgrel=2
+pkgrel=3
 pkgdesc="A translator library for raster and vector geospatial data formats"
-url="http://gdal.org"
+url="https://gdal.org"
 arch="all"
 license="MIT"
-depends=""
 depends_dev="gdal"
 makedepends="
 	curl-dev
@@ -23,6 +22,7 @@ makedepends="
 	swig
 	tiff-dev
 	zlib-dev
+	expat-dev
 	"
 subpackages="
 	$pkgname-dev
@@ -30,11 +30,8 @@ subpackages="
 	"
 
 source="http://download.osgeo.org/$pkgname/$pkgver/$pkgname-$pkgver.tar.xz"
-builddir="$srcdir/$pkgname-$pkgver"
 
 build() {
-	cd "$builddir"
-
 	./configure --prefix=/usr \
 		--with-curl=/usr/bin/curl-config
 	make
@@ -44,8 +41,6 @@ build() {
 }
 
 package() {
-	cd "$builddir"
-
 	make DESTDIR="$pkgdir" install
 	chmod -x "$pkgdir"/usr/include/*.h
 }
@@ -64,7 +59,6 @@ py() {
 check() {
 	# TODO: https://trac.osgeo.org/gdal/wiki/TestingNotes
 
-	cd "$builddir"
 	apps/gdal-config --version | grep "$pkgver"
 
 	# confirms MBTiles support