tiny increase of lambda layer size limit (#760)

* tiny increase of lambda layer size limit

* Update scripts/check_layer_size.sh

Co-authored-by: Brett Langdon <brett.langdon@datadoghq.com>

---------

Co-authored-by: Brett Langdon <brett.langdon@datadoghq.com>

Author: emmettbutler

scripts/check_layer_size.sh

@@ -8,7 +8,7 @@
 # Compares layer size to threshold, and fails if below that threshold
 
 set -e
-MAX_LAYER_COMPRESSED_SIZE_KB=$(expr 9 \* 1024)      # 9216 KB
+MAX_LAYER_COMPRESSED_SIZE_KB=$(expr 9 \* 1024 + 15)      # 9231 KB
 MAX_LAYER_UNCOMPRESSED_SIZE_KB=$(expr 25 \* 1024)   # 25600 KB