Update Signature URL in EA BootJDK download, so Location field longer…

… case sensitive (#4002)

* Update Signature URL, so no longer case sensitive.

* Fix BootJDK EA Download

sbin/common/downloaders.sh

@@ -71,7 +71,7 @@ function downloadLinuxBootJDK() {
     set +e
     curl -L -o bootjdk.tar.gz "${apiURL}"
     if ! grep "No releases match the request" bootjdk.tar.gz; then
-      apiSigURL=$(curl -v "${apiURL}" 2>&1 | tr -d \\r | awk '/^< Location:/{print $3 ".sig"}')
+      apiSigURL=$(curl -v "${apiURL}" 2>&1 | tr -d \\r | awk '/^< [Ll]ocation:/{print $3 ".sig"}')
       curl -L -o bootjdk.tar.gz.sig "${apiSigURL}"
       gpg --keyserver keyserver.ubuntu.com --recv-keys 3B04D753C9050D9A5D343F39843C48A565F8F04B
       echo -e "5\ny\n" |  gpg --batch --command-fd 0 --expert --edit-key 3B04D753C9050D9A5D343F39843C48A565F8F04B trust;