gstreamer1.0-plugins-bad: Add dependency on libdrm when wayland is enabled

Fixes

WARNING: gstreamer1.0-plugins-bad-1.12.2-r0 do_package_qa: QA Issue: libgstwayland-1.0 rdepends on libdrm, but it isn't a build dependency, missing libdrm in DEPENDS or PACKAGECONFIG? [build-deps]
WARNING: gstreamer1.0-plugins-bad-1.12.2-r0 do_package_qa: QA Issue: gstreamer1.0-plugins-bad-waylandsink rdepends on libdrm, but it isn't a build dependency, missing libdrm in DEPENDS or PACKAGECONFIG? [build-deps]

(From OE-Core rev: cb2c00c369e61b0e61298b0ad076e5bc8bc67bb9)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/gstreamer/gstreamer1.0-plugins-bad.inc

@@ -65,7 +65,7 @@ PACKAGECONFIG[uvch264]         = "--enable-uvch264,--disable-uvch264,libusb1 lib
 PACKAGECONFIG[voaacenc]        = "--enable-voaacenc,--disable-voaacenc,vo-aacenc"
 PACKAGECONFIG[voamrwbenc]      = "--enable-voamrwbenc,--disable-voamrwbenc,vo-amrwbenc"
 PACKAGECONFIG[vulkan]          = "--enable-vulkan,--disable-vulkan,vulkan"
-PACKAGECONFIG[wayland]         = "--enable-wayland,--disable-wayland,wayland-native wayland wayland-protocols"
+PACKAGECONFIG[wayland]         = "--enable-wayland,--disable-wayland,wayland-native wayland wayland-protocols libdrm"
 PACKAGECONFIG[webp]            = "--enable-webp,--disable-webp,libwebp"
 
 # these plugins have no corresponding library in OE-core or meta-openembedded: