Update build.sh

port/iOS/build.sh

@@ -50,7 +50,7 @@ build_arch()
 
     rm CMakeCache.txt
 
-    cmake  -G 'Unix Makefiles' -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_$(echo $1 | tr '[:lower:]' '[:upper:]')_TOOLCHAIN.cmake -DENABLE_BOOST_WORKAROUND=ON -DASSIMP_BUILD_STATIC_LIB=ON
+    cmake  -G 'Unix Makefiles' -DCMAKE_TOOLCHAIN_FILE=./port/iOS/IPHONEOS_$(echo $1 | tr '[:lower:]' '[:upper:]')_TOOLCHAIN.cmake -DENABLE_BOOST_WORKAROUND=ON -DBUILD_SHARED_LIBS=OFF
 
     echo "[!] Building $1 library"