afdo_metadata: Update kernel AFDO profiles

Update chromeos-kernel-3_18 to R87-13482.0-1601286522
Update chromeos-kernel-4_4 to R87-13482.0-1601285703
Update chromeos-kernel-4_14 to R87-13482.0-1601285982
Update chromeos-kernel-4_19 to R87-13482.0-1601286143

Also fixed the script a little bit to supress a warning.

BUG=None
TEST=None

Change-Id: I50be925fd9f598fb834a5b3153f86f29679844c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2436058
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Tiancong Wang <tcwang@google.com>
Tested-by: Tiancong Wang <tcwang@google.com>
diff --git a/afdo_metadata/kernel_afdo.json b/afdo_metadata/kernel_afdo.json
index 5877940..ea0237d 100644
--- a/afdo_metadata/kernel_afdo.json
+++ b/afdo_metadata/kernel_afdo.json
@@ -1,14 +1,14 @@
 {
     "chromeos-kernel-3_18": {
-        "name": "R87-13421.11-1599471395"
+        "name": "R87-13482.0-1601286522"
     },
     "chromeos-kernel-4_4": {
-        "name": "R87-13421.11-1599472924"
+        "name": "R87-13482.0-1601285703"
     },
     "chromeos-kernel-4_14": {
-        "name": "R87-13421.11-1599471640"
+        "name": "R87-13482.0-1601285982"
     },
     "chromeos-kernel-4_19": {
-        "name": "R87-13421.11-1599472679"
+        "name": "R87-13482.0-1601286143"
     }
 }
diff --git a/afdo_tools/update_kernel_afdo b/afdo_tools/update_kernel_afdo
index 8f100a1..8eb1306 100755
--- a/afdo_tools/update_kernel_afdo
+++ b/afdo_tools/update_kernel_afdo
@@ -62,7 +62,7 @@
   # R86-13310.3-1594633089.gcov.xz goes after R86-13310.18-1595237847.gcov.xz)
   latest=$(gsutil ls -l "$GS_BASE/$kver/" | sort -k2 | \
            grep "R${canary}" | tail -1 || true)
-  if [ -z $latest ]
+  if [ -z "$latest" ]
   then
     # if no profiles exist for R${canary}, try the previous branch
     latest=$(gsutil ls -l "$GS_BASE/$kver/" | sort -k2 | \