gstreamer1.0: Convert tests and valgrind config opts to PACKAGECONFIGs

I need to be able to run unit tests and build with valgrind support.

(From OE-Core rev: 287809aee528fa81f024c6005a7e8572643e6fb4)

Signed-off-by: Fabrice Coulon <fabrice.coulon@axis.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.inc

@@ -11,11 +11,12 @@ inherit autotools pkgconfig gettext
 
 PACKAGECONFIG[debug] = "--enable-debug,--disable-debug"
 PACKAGECONFIG[check] = "--enable-check,--disable-check"
+PACKAGECONFIG[tests] = "--enable-tests,--disable-tests"
+PACKAGECONFIG[valgrind] = "--enable-valgrind,--disable-valgrind,valgrind,"
 
 EXTRA_OECONF = "--disable-docbook --disable-gtk-doc \
                 --disable-dependency-tracking \
-                --disable-examples --disable-tests \
-                --disable-valgrind \
+                --disable-examples \
                 "
 
 RRECOMMENDS_${PN}_qemux86    += "kernel-module-snd-ens1370 kernel-module-snd-rawmidi"
@@ -26,4 +27,3 @@ CACHED_CONFIGUREVARS += "ac_cv_header_valgrind_valgrind_h=no"
 FILES_${PN} += " ${libdir}/gstreamer-1.0/*.so ${datadir}/bash-completion/completions/ ${datadir}/bash-completion/helpers/gst*"
 FILES_${PN}-dev += " ${libdir}/gstreamer-1.0/*.la ${libdir}/gstreamer-1.0/*.a ${libdir}/gstreamer-1.0/include"
 FILES_${PN}-dbg += " ${libdir}/gstreamer-1.0/.debug/ ${libexecdir}/gstreamer-1.0/.debug/ ${datadir}/bash-completion/helpers/.debug/"
-