community/autoconf2.13: fix build on riscv64

community/autoconf2.13/APKBUILD

@@ -8,7 +8,7 @@ license="GPL-2.0"
 url="https://www.gnu.org/software/autoconf"
 depends="m4 perl"
 checkdepends="dejagnu flex gfortran"
-source="https://ftp.gnu.org/pub/gnu/autoconf/autoconf-${pkgver}.tar.gz
+source="https://ftp.gnu.org/pub/gnu/autoconf/autoconf-$pkgver.tar.gz
 	getloadavg.patch
 	"
 subpackages="$pkgname-doc"
@@ -17,21 +17,19 @@ builddir="$srcdir"/autoconf-$pkgver
 prepare() {
 	default_prepare
 	update_config_sub  # Required for AC_F77_LIBRARY_LDFLAGS
+	update_config_guess
 }
 
 build() {
-	cd "$builddir"
 	M4=/usr/bin/m4 ./configure --prefix=/usr --program-suffix=-2.13
 	make
 }
 
 check() {
-	cd "$builddir"
 	F77=gfortran make check
 }
 
 package() {
-	cd "$builddir"
 	make prefix="$pkgdir/usr" infodir="$pkgdir/usr/share/info" install
 
 	rm -f "$pkgdir"/usr/share/info/dir