task-self-hosted.bb,task-core-lsb.bb: Conditionalize pth inclusion

pth is not portable to uclibc therefore we need to exclude it for
uclibc based systems.

(From OE-Core rev: 6482f276533f3a177e07def9d616958d9bbc10c6)

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

meta/recipes-core/tasks/task-self-hosted.bb

@@ -137,7 +137,7 @@ RDEPENDS_task-self-hosted-extended = "\
     perl-dev \
     perl-modules \
     perl-pod \
-    pth \
+    ${PTH} \
     python \
     python-compile \
     python-compiler \
@@ -199,3 +199,5 @@ RDEPENDS_task-self-hosted-graphics = "\
     python-pygtk \
     gtk-theme-clearlooks \
     "
+PTH = "pth"
+PTH_libc-uclibc = ""

meta/recipes-extended/tasks/task-core-lsb.bb

@@ -70,7 +70,7 @@ RDEPENDS_task-core-sys-extended = "\
     minicom \
     neon \
     parted \
-    pth \
+    ${PTH} \
     quota \
     screen \
     setserial \
@@ -197,3 +197,7 @@ RDEPENDS_task-core-lsb-runtime-add = "\
     eglibc-pic \
     eglibc-utils \
 "
+
+PTH = "pth"
+PTH_libc-uclibc = ""
+