cmake: add installation target
This allows to run `$BUILDTOOL install` to install `basisu` on your system, where `$BUILDTOOL` might be `ninja` or `make` for instance
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c877223..62d4a41 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,6 +75,8 @@
add_executable(basisu ${BASISU_SRC_LIST})
target_link_libraries(basisu m pthread)
+install(TARGETS basisu DESTINATION bin)
+
if (CMAKE_BUILD_TYPE STREQUAL Release)
if (APPLE)
add_custom_command(TARGET basisu POST_BUILD COMMAND strip -X -x ${CMAKE_SOURCE_DIR}/${BIN_DIRECTORY}/basisu)
