audio/lmms: Fix build on x86_64

Thanks to David Somero for the heads-up and fix.

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

audio/lmms/README

@@ -3,3 +3,5 @@ Studio, which allow you to produce music with your computer. This includes
 the creation of melodies and beats, the synthesis and mixing of sounds, and
 arranging of samples. You can have fun with your MIDI-keyboard and much
 more; all in a user-friendly and modern interface.
+
+jack-audio-connection-kit, portaudio, pulseaudio, fluidsynth are optional.

audio/lmms/lmms.SlackBuild

@@ -52,14 +52,15 @@ find . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
-sed -i 's|lib64|lib|g' cmake/modules/DetectMachine.cmake
 patch -p1 < $CWD/lmms-unlink.patch
+
 mkdir build
 cd build
   cmake \
     -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_INSTALL_PREFIX=/usr \
+    -DCMAKE_INSTALL_LIBDIR=/usr/lib${LIBDIRSUFFIX} \
     ..
 
   make VERBOSE=1