libraries/paho-mqtt: Update to 15.0 template.

Signed-off-by: B. Watson <yalhcru@gmail.com>

libraries/paho-mqtt/paho-mqtt.SlackBuild

@@ -22,6 +22,8 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+cd $(dirname $0) ; CWD=$(pwd)
+
 PRGNAM=paho-mqtt
 SRCNAM=paho.mqtt.python
 VERSION=${VERSION:-1.6.1}
@@ -36,24 +38,16 @@ if [ -z "$ARCH" ]; then
   esac
 fi
 
-CWD=$(pwd)
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
 TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
-if [ "$ARCH" = "i586" ]; then
-  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
-  LIBDIRSUFFIX=""
-elif [ "$ARCH" = "i686" ]; then
-  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
-  LIBDIRSUFFIX=""
-elif [ "$ARCH" = "x86_64" ]; then
-  SLKCFLAGS="-O2 -fPIC"
-  LIBDIRSUFFIX="64"
-else
-  SLKCFLAGS="-O2"
-  LIBDIRSUFFIX=""
-fi
+# 20220312 bkw: no compiled code, no need for CFLAGS.
 
 set -e
 
@@ -66,17 +60,16 @@ cd $SRCNAM-$VERSION
 chown -R root:root .
 find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
-  -o -perm 511 \) -exec chmod 755 {} \; -o \
+  -o -perm 511 \) -exec chmod 755 {} \+ -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
-  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \+
 
 python setup.py install --root=$PKG
 if $(python3 -c 'import sys' 2>/dev/null); then
   python3 setup.py install --root=$PKG
 fi
 
-find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
-  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+# 20220312 bkw: no compiled code, no need to strip anything.
 
 mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 cp -a \