Add legacy_http_javalib gyp target for apache in the M sdk.

Change-Id: Ia8890d85aff0b0bd1c9d7a38d0ec9689ae4ee91e
Reviewed-on: https://chromium-review.googlesource.com/294560
Reviewed-by: Aurimas Liutikas <aurimas@chromium.org>
Commit-Queue: Aurimas Liutikas <aurimas@chromium.org>
Tested-by: Aurimas Liutikas <aurimas@chromium.org>