gst: fixed the install command for gdb python macros on macos - `install -D`...

gst: fixed the install command for gdb python macros on macos - `install -D` is not supported by BSD install
4 jobs for rsiv-master-patch-22506 in 8 minutes and 47 seconds (queued for 1 second)
Status Job ID Name Coverage
  Preparation
passed #58188
gst indent

00:00:35

passed #58187
manifest

00:00:23

 
  Build
passed #58189
build fedora x86_64

00:03:30

 
  Full Builds
passed #58190
build android arm64 api28

00:04:41