freedreno: Fix file descriptor leak.

Fix defect reported by Coverity Scan.

Resource leak (RESOURCE_LEAK)
leaked_handle: Handle variable fd going out of scope leaks the handle.

Fixes: 536f43cb ("freedreno: slurp in afuc")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
35 jobs for !8278 with fix-cid-1110568 in 16 seconds (queued for 4 seconds)
detached
Status Job ID Name Coverage
  Sanity
passed #6397558
sanity

00:00:16

 
  Container
manual #6397561
aarch64 manual
arm_build
manual #6397562
manual
arm_test-base
manual #6397563
windows shell 1809 mesa manual
windows_build_vs2019
manual #6397559
manual
x86_build-base
manual #6397560
manual
x86_test-base
 
  Container 2
created #6397571
android_build
created #6397574
arm64_test
created #6397575
armhf_test
created #6397568
i386_build
created #6397564
kernel+rootfs_amd64
created #6397565
aarch64
kernel+rootfs_arm64
created #6397566
aarch64
kernel+rootfs_armhf
created #6397569
ppc64el_build
created #6397570
s390x_build
created #6397567
x86_build
created #6397572
x86_test-gl
created #6397573
x86_test-vk
 
  Meson X86 64
created #6397581
meson-clang
created #6397582
meson-clover
created #6397578
meson-clover-testing
created #6397579
meson-gallium
created #6397580
meson-release
created #6397576
meson-testing
created #6397577
meson-testing-asan
created #6397583
meson-vulkan
 
  Build Misc
created #6397584
meson-android
created #6397586
aarch64
meson-arm64
created #6397587
aarch64
meson-arm64-build-test
created #6397585
aarch64
meson-armhf
created #6397589
meson-i386
created #6397592
meson-mingw32-x86_64
created #6397591
kvm
meson-ppc64el
created #6397590
kvm
meson-s390x
created #6397588
allowed to fail
scons-win64