Travis: disable build server for clang

CI/before_script.linux.sh

@@ -6,10 +6,12 @@ cd build
 export CODE_COVERAGE=1
 export RAKNET_ROOT=~/RakNet
 export Terra_ROOT=~/terra-Linux-x86_64-332a506
+export BUILD_SERVER=OFF
 if [ "${CC}" = "clang" ]; then export CODE_COVERAGE=0; 
 else 
     export COMPILER_NAME=gcc
     export CXX=g++-6
     export CC=gcc-6
+    export BUILD_SERVER=ON
 fi
-${ANALYZE}cmake .. -DBUILD_WITH_CODE_COVERAGE=${CODE_COVERAGE} -DBUILD_BSATOOL=OFF -DBUILD_ESMTOOL=OFF -DBUILD_ESSIMPORTER=OFF -DBUILD_LAUNCHER=OFF -DBUILD_MWINIIMPORTER=OFF -DBUILD_MYGUI_PLUGIN=OFF -DBUILD_OPENCS=OFF -DBUILD_WIZARD=OFF -DBUILD_UNITTESTS=1 -DCMAKE_INSTALL_PREFIX=/usr -DBINDIR=/usr/games  -DCMAKE_BUILD_TYPE="None" -DUSE_SYSTEM_TINYXML=TRUE -DRakNet_LIBRARY_RELEASE=~/RakNet/lib/libRakNetLibStatic.a -DRakNet_LIBRARY_DEBUG=~/RakNet/lib/libRakNetLibStatic.a
+${ANALYZE}cmake .. -DBUILD_OPENMW_MP=${BUILD_SERVER} -DBUILD_WITH_CODE_COVERAGE=${CODE_COVERAGE} -DBUILD_BSATOOL=OFF -DBUILD_ESMTOOL=OFF -DBUILD_ESSIMPORTER=OFF -DBUILD_LAUNCHER=OFF -DBUILD_MWINIIMPORTER=OFF -DBUILD_MYGUI_PLUGIN=OFF -DBUILD_OPENCS=OFF -DBUILD_WIZARD=OFF -DBUILD_UNITTESTS=1 -DCMAKE_INSTALL_PREFIX=/usr -DBINDIR=/usr/games  -DCMAKE_BUILD_TYPE="None" -DUSE_SYSTEM_TINYXML=TRUE -DRakNet_LIBRARY_RELEASE=~/RakNet/lib/libRakNetLibStatic.a -DRakNet_LIBRARY_DEBUG=~/RakNet/lib/libRakNetLibStatic.a