libsdl2-ttf: add pkgconfig to inherit and unblacklist

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>

meta-oe/recipes-support/libsdl-ttf/libsdl2-ttf_2.0.14.bb

@@ -13,7 +13,7 @@ SRC_URI[sha256sum] = "34db5e20bcf64e7071fe9ae25acaa7d72bdc4f11ab3ce59acc768ab62f
 
 S = "${WORKDIR}/SDL2_ttf-${PV}"
 
-inherit autotools
+inherit autotools pkgconfig
 
 do_configure_prepend() {
     touch ${S}/NEWS ${S}/README ${S}/AUTHORS ${S}/ChangeLog
@@ -25,5 +25,3 @@ do_configure_prepend() {
         rm -f ${S}/acinclude/$i
     done
 }
-
-PNBLACKLIST[libsdl2-ttf] ?= "Fails to build with RSS http://errors.yoctoproject.org/Errors/Details/130656/"