libraries/msgpack-c: Script clean up.

Signed-off-by: Benjamin Trigona-Harany <bosth@alumni.sfu.ca>

libraries/msgpack-c/msgpack-c.SlackBuild

@@ -2,7 +2,7 @@
 
 # SlackBuild script for msgpack-c
 
-# Copyright 2014 Benjamin Trigona-Harany <slackbuilds@jaxartes.net>
+# Copyright 2014-2018 Benjamin Trigona-Harany <slackbuilds@jaxartes.net>
 # All rights reserved.
 #
 # Redistribution and use of this script, with or without modification, is
@@ -68,20 +68,19 @@ find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
   -o -perm 511 \) -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 {} \;
 
-# this fixes install and msgpack.pc
-sed -i "s/\/lib/\/lib${LIBDIRSUFFIX}/" CMakeLists.txt
-
-cmake \
+mkdir -p build
+cd build
+  cmake \
     -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_INSTALL_PREFIX=/usr \
-    -DCMAKE_INSTALL_LIBDIR=/usr/lib${LIBDIRSUFFIX} .
-
-make
-make install DESTDIR=$PKG
+    -DCMAKE_INSTALL_LIBDIR=/usr/lib${LIBDIRSUFFIX} \
+   ..
+   make install DESTDIR=$PKG
+cd ..
 
 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