libnice, farsight2: unblacklist as libnice's nice.pc issue fixed.

* Update do_compile_append where it was updating *.pc from ${S} and
  removing staging dir folder. Now we have seperate build folder
  where packages get build. We have to search pc in ${B} not in ${S}.
  After updating the tmp dir path is removed from nice.pc file.
* Remove PNBLACKLIST for libnice and farsight2 recipes.

Signed-off-by: Noor Ahsan <noor_ahsan@mentor.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/farsight/farsight2_0.0.22.bb

@@ -28,5 +28,3 @@ FILES_${PN}-dbg += "${libdir}/*/.debug"
 
 SRC_URI[md5sum] = "e1f540cf3ebab06c3d7db1f46b44ac88"
 SRC_URI[sha256sum] = "3ae59aa61a8071c9fad111e5fd606aabc27961eb4192f8729987a27dae6b3974"
-
-PNBLACKLIST[farsight2] ?= "Depends on broken libnice"

meta-oe/recipes-support/farsight/libnice_0.0.13.bb

@@ -28,7 +28,7 @@ do_configure_prepend() {
 }
 
 do_compile_append() {
-    for i in $(find ${S} -name "*.pc") ; do
+    for i in $(find ${B} -name "*.pc") ; do
         sed -i -e s:${STAGING_DIR_TARGET}::g \
                -e s:/${TARGET_SYS}::g \
                   $i
@@ -38,5 +38,3 @@ do_compile_append() {
 
 SRC_URI[md5sum] = "e5b9f799a57cb939ea2658ec35253ab9"
 SRC_URI[sha256sum] = "d8dd260c486a470a6052a5323920878a084e44a19df09b15728b85c9e3d6edf0"
-
-PNBLACKLIST[libnice] ?= "BROKEN: QA Issue: nice.pc failed sanity test (tmpdir)"