package/gstreamer1/gst1-devtools: install to staging

This will fix the following build failure with
gstreamer1-editing-services which optionally depends on gst1-devtools
since commit 08a213c1a532de783a7cedaa29088ffb736827bd:

Run-time dependency gst-validate-1.0 found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency gst-validate-1.0

../output-1/build/gstreamer1-editing-services-1.18.0/ ERROR: Subproject directory not found and gst-devtools.wrap file not found


Signed-off-by: Fabrice Fontaine <>
Signed-off-by: Yann E. MORIN <>
1 file changed