Fixed framework compilation and changed the configure script to configure VLC...

Fixed framework compilation and changed the configure script to configure VLC with the SDK selected in Xcode (at present: the current OS X version)

projects/macosx/framework/VLCKit.xcodeproj/project.pbxproj

@@ -356,7 +356,7 @@
 /* Begin PBXLegacyTarget section */
 		633BD6DB0D2ADE4E0012A314 /* vlc-core */ = {
 			isa = PBXLegacyTarget;
-			buildArgumentsString = vlc;
+			buildArgumentsString = "";
 			buildConfigurationList = 633BD6DF0D2ADE6D0012A314 /* Build configuration list for PBXLegacyTarget "vlc-core" */;
 			buildPhases = (
 			);
@@ -482,7 +482,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if test $ACTION = \"clean\"\nthen\n\trm -Rf $SYMROOT/vlc_build_dir\n     exit 0\nfi\n\ntop_srcdir=`pwd`/../../..\n\nmkdir -p $SYMROOT/vlc_build_dir\ncd $SYMROOT/vlc_build_dir && $top_srcdir/configure --disable-nls --enable-debug -C\n";
+			shellScript = "if test $ACTION = \"clean\"\nthen\n\trm -Rf $SYMROOT/vlc_build_dir\n     exit 0\nfi\n\ntop_srcdir=`pwd`/../../..\n\nmkdir -p $SYMROOT/vlc_build_dir\ncd $SYMROOT/vlc_build_dir && $top_srcdir/configure --disable-nls --enable-debug --with-macosx-sdk=$SDKROOT -C\n";
 			showEnvVarsInLog = 0;
 		};
 		EF78BD2E0CAEEF9500354E6E /* ShellScript */ = {