python/python-importlib_metadata: Fixed PRGNAM in build script

Signed-off-by: Robby Workman <rworkman@slackbuilds.org>

python/python-importlib_metadata/python-importlib_metadata.SlackBuild

@@ -22,12 +22,13 @@
 #  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-SRCNAM=importlib_metadata
-PRGNAM=python-$SRCNAM
+PRGNAM=python-importlib_metadata
 VERSION=${VERSION:-1.3.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
+SRCNAM=importlib_metadata
+
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
     i?86) ARCH=i586 ;;