pluginloader: only run gst-plugin-scanner with /usr/bin/arch wrapper on OS X >= 10.5
pluginloader: only run gst-plugin-scanner with /usr/bin/arch wrapper on OS X >= 10.5

Based on patch by: Daniel Macks <dmacks@netspace.org>

Earlier versions of OSX don't support proper multiarch and
trying to use /usr/bin/arch -foo with those versions would
just break things.

https://bugzilla.gnome.org/show_bug.cgi?id=615357

lubosz/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,mparis/gstreamer,krichter722/gstreamer,drothlis/gstreamer,drothlis/gstreamer,lovebug356/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,lubosz/gstreamer,cfoch/gstreamer,collects/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,centricular/gstreamer,jpxiong/gstreamer,ahmedammar/platform_external_gst_gstreamer,mparis/gstreamer,centricular/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,centricular/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,cablelabs/gstreamer,collects/gstreamer,magcius/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,cablelabs/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,drothlis/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,collects/gstreamer,collects/gstreamer,collects/gstreamer,surround-io/gstreamer,Lachann/gstreamer,magcius/gstreamer,ylatuya/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,magcius/gstreamer,ylatuya/gstreamer,Distrotech/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,justinjoy/gstreamer,lovebug356/gstreamer,mparis/gstreamer,centricular/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,Distrotech/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,ensonic/gstreamer,mparis/gstreamer,ensonic/gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,cablelabs/gstreamer,ahmedammar/platform_external_gst_gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,cablelabs/gstreamer,lovebug356/gstreamer,drothlis/gstreamer,ensonic/gstreamer,Distrotech/gstreamer,ylatuya/gstreamer,jpakkane/gstreamer,Distrotech/gstreamer,Lachann/gstreamer,Distrotech/gstreamer,lubosz/gstreamer,lubosz/gstreamer,ylatuya/gstreamer,shelsonjava/gstreamer,ensonic/gstreamer,ensonic/gstreamer,surround-io/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,ylatuya/gstreamer,krichter722/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,drothlis/gstreamer,krichter722/gstreamer,krichter722/gstreamer,Lachann/gstreamer,jpxiong/gstreamer