Create cross-arm-android-gnueabi.cmake

add cross cmake config file

contrib/cross-arm-android-gnueabi.cmake

+#
+# CMake Toolchain file for crosscompiling on ARM.
+#
+# This can be used when running cmake in the following way:
+#  cd build/
+#  cmake .. -DCMAKE_TOOLCHAIN_FILE=../cross-arm-linux-gnueabihf.cmake
+#
+
+set(CROSS_PATH /opt/libwebsockets_android/android-toolchain-arm)
+
+# Target operating system name.
+set(CMAKE_SYSTEM_NAME Android)
+
+# Target build dynamic libs.
+set(BUILD_SHARED_LIBS ON)
+
+# Name of C compiler.
+set(CMAKE_C_COMPILER "${CROSS_PATH}/bin/arm-linux-androideabi-gcc")
+set(CMAKE_CXX_COMPILER "${CROSS_PATH}/bin/arm-linux-androideabi-g++")
+
+# Where to look for the target environment. (More paths can be added here)
+set(CMAKE_FIND_ROOT_PATH "${CROSS_PATH}")
+
+# Adjust the default behavior of the FIND_XXX() commands:
+# search programs in the host environment only.
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# Search headers and libraries in the target environment only.
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)