[magma] Install SDK headers to /usr/include/magma

Change-Id: I393fa68fad16fb0a1f0c3ce632179acd8374f36a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/3955043
Reviewed-by: Tim Detwiler <tjdetwiler@google.com>
Tested-by: Craig Stout <cstout@google.com>
1 file changed