Revert "temp/qemu: disable block-curl module" (!112)

This reverts commit c83052c9f3.
This workaround is no longer needed thanks to !109.
I have confirmed that qemu still compiles for aarch64. [skip ci]

temp/qemu/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=qemu
 pkgver=9999
 _pkgver=3.0.0
-pkgrel=3
+pkgrel=4
 pkgdesc="QEMU is a generic machine emulator and virtualizer"
 url="http://qemu.org/"
 arch="all"
@@ -10,6 +10,7 @@ license="GPL-2.0 LGPL-2"
 makedepends="
 	alsa-lib-dev
 	bison
+	curl-dev
 	flex
 	glib-dev
 	glib-static
@@ -130,6 +131,7 @@ _modules="
 	audio-alsa
 	audio-oss
 	audio-sdl
+	block-curl
 	block-dmg-bz2
 	block-nfs
 	block-ssh
@@ -250,6 +252,7 @@ build() {
 		--disable-linux-user \
 		--audio-drv-list=oss,alsa,sdl \
 		--enable-cap-ng \
+		--enable-curl \
 		--enable-curses \
 		--enable-docs \
 		--enable-gtk \