Fix build.sh to not rely on default Makefile target (#164)

Before this, calling `make` would get the "check-licenses" target
instead of the "build" target it was written to use.

Author: trentm

apm-lambda-extension/Makefile

@@ -15,6 +15,9 @@ endif
 
 export AWS_FOLDER GOARCH ARCHITECTURE
 
+.PHONY: all
+all: build
+
 check-licenses:
 	go install github.com/elastic/go-licenser@v0.4.0
 	go run github.com/elastic/go-licenser@v0.4.0 -d .

apm-lambda-extension/build.sh

@@ -1,12 +1,12 @@
 #!/bin/sh
 
 # build the go extension, and then zip up
-make && cd bin && zip -r extension.zip extensions
+make all && cd bin && zip -r extension.zip extensions
 
 # then run this command with amazon stuff exported
 
 # AWS_ACCESS_KEY_ID='' AWS_SECRET_ACCESS_KEY='' \
 # aws lambda publish-layer-version \
 #  --layer-name "apm-lambda-extension" \
 #  --region us-west-2 \
-#  --zip-file  "fileb://extension.zip"
+#  --zip-file  "fileb://extension.zip"