bc: separate B and S

It works well now, and bump the PR to avoid:
configure: error: source directory already configured; run "make distclean" there first

(From OE-Core rev: f8fbbc92134a8dfdbc6923cea04e55a2e73fc6dd)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/bc/bc_1.06.bb

@@ -10,7 +10,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=94d55d512a9ba36caa9b7df079bae19f \
 
 SECTION = "base"
 DEPENDS = "flex"
-PR = "r2"
+PR = "r3"
 
 SRC_URI = "${GNU_MIRROR}/bc/bc-${PV}.tar.gz \
            file://fix-segment-fault.patch "
@@ -18,7 +18,7 @@ SRC_URI = "${GNU_MIRROR}/bc/bc-${PV}.tar.gz \
 SRC_URI[md5sum] = "d44b5dddebd8a7a7309aea6c36fda117"
 SRC_URI[sha256sum] = "4ef6d9f17c3c0d92d8798e35666175ecd3d8efac4009d6457b5c99cea72c0e33"
 
-inherit autotools-brokensep texinfo update-alternatives
+inherit autotools texinfo update-alternatives
 
 ALTERNATIVE_${PN} = "dc"
 ALTERNATIVE_PRIORITY = "100"