misc/projectM: Fixed generated pkgconfig file

http://forum.videolan.org/viewtopic.php?f=13&t=77264

Essentially, unless a libdir is passed to projectM's cmake config,
it ($libdir) is left blank.  As result, the .pc file has a blank,
i.e. "-L -lprojectM" instead of "-L/usr/lib -lprojectM" and this
causes at least VLC to bail out.

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

misc/projectM/projectM.SlackBuild

@@ -6,7 +6,7 @@
 
 PRGNAM=projectM
 VERSION=${VERSION:-2.0.1}
-BUILD=${BUILD:-1}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -57,6 +57,7 @@ cd build
     -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_INSTALL_PREFIX=/usr \
+    -DLIB_INSTALL_DIR=/usr/lib${LIBDIRSUFFIX} \
     -DLIB_SUFFIX=${LIBDIRSUFFIX} \
     -DMAN_INSTALL_DIR=/usr/man \
     -DCMAKE_BUILD_TYPE=Release ..