Add missing http_transport_test_server to gyp build
Add missing http_transport_test_server to gyp build

Follow up to https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1013293.

Bug: crashpad:196, crashpad:227, crashpad:30
Change-Id: I87f18dce6a49f537cff5c9f3af2fe78b8d87c2ef
Reviewed-on: https://chromium-review.googlesource.com/1022738
Reviewed-by: Joshua Peraza <f5809a5e35ec7e1bd0e25cb0a0b68bb433cf6f17@chromium.org>
Commit-Queue: Scott Graham <e134406e1863f3b48b0795831afac5c0595efb36@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad