main/libxshmfence: rebuild to fix BAD signature errors

main/libxshmfence/APKBUILD

@@ -2,20 +2,17 @@
 # Maintainer:
 pkgname=libxshmfence
 pkgver=1.3
-pkgrel=0
+pkgrel=1
 pkgdesc="X11 shared memory fences"
 url="https://www.x.org/"
 arch="all"
 license="MIT"
-depends=""
 depends_dev="linux-headers"
 makedepends="$depends_dev util-macros xorgproto"
-install=""
 subpackages="$pkgname-dev"
 source="https://www.x.org/releases/individual/lib/libxshmfence-$pkgver.tar.bz2"
 
 build() {
-	cd "$builddir"
 	./configure \
 		--build=$CBUILD \
 		--host=$CHOST \
@@ -26,12 +23,10 @@ build() {
 }
 
 check() {
-	cd "$builddir"
 	make check
 }
 
 package() {
-	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 }