temp/libdrm-grate: move from main (!571)

[ci skip] Package output does not change except for meta
information (licenses), so don't build or verify checksums
of the packages to prevent outdated source URL's breaking it.
This will have to be looked at later

temp/libdrm-grate/APKBUILD

@@ -1,4 +1,4 @@
-# Maintainer: Robert Yang <decatf@gmail.com>
+# Forked from Alpine, so we can build it with Grate support
 pkgname=libdrm-grate
 pkgver=2.4.91
 pkgrel=2
@@ -25,7 +25,6 @@ _pkgname=libdrm
 builddir="$srcdir/$_pkgname-$_commit"
 
 build() {
-	cd "$builddir"
 	export VALGRIND_CFLAGS="$VALGRIND_CFLAGS -I/usr/include/valgrind/"
 	./autogen.sh \
 		--build=$CBUILD \
@@ -47,12 +46,10 @@ build() {
 }
 
 check() {
-	cd "$builddir"
 	make check
 }
 
 package() {
-	cd "$builddir"
 	make DESTDIR="$pkgdir" install
 
 	cd "$pkgdir"/usr/lib