gstreamer1: fix hash files

gstreamer1: fix hash files

In many gstreamer1 packages, the line containing a comment about the
origin of the hash was not prefixed with a pound sign as it should be.

Fixes those check-package warnings:

./package/gstreamer1/gst1-plugins-good/gst1-plugins-good.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-good/gst1-plugins-good.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-bad/gst1-plugins-bad.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-bad/gst1-plugins-bad.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-vaapi/gst1-vaapi.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-vaapi/gst1-vaapi.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-ugly/gst1-plugins-ugly.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-ugly/gst1-plugins-ugly.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-base/gst1-plugins-base.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-plugins-base/gst1-plugins-base.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gstreamer1/gstreamer1.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gstreamer1/gstreamer1.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-rtsp-server/gst1-rtsp-server.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-rtsp-server/gst1-rtsp-server.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-libav/gst1-libav.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst1-libav/gst1-libav.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst-omx/gst-omx.hash:1: expected three fields (http://nightly.buildroot.org/#adding-packages-hash)
./package/gstreamer1/gst-omx/gst-omx.hash:1: unexpected type of hash (http://nightly.buildroot.org/#adding-packages-hash)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>