build: Install static lib

installing the static lib will also install headers (Fixes: jerryscript-project#1896).

This is useful for debian's iotjs-dev package

Change-Id: Ib9f6cb50631f4cdfeb308108f91ed28e7d204dc4
Forwarded: jerryscript-project#1948
Origin: https://github.com/TizenTeam/iotjs/tree/sandbox/rzr/cmake/lib/review/master
Bug: jerryscript-project#1945
Bug-Debian: https://bugs.debian.org/957364
Relate-to: jerryscript-project#1896
Last-Update: 2020-10-15
IoT.js-DCO-1.0-Signed-off-by: Philippe Coval rzr@users.sf.net

cmake/iotjs.cmake

@@ -580,7 +580,7 @@ if(NOT BUILD_LIB_ONLY)
   )
   target_include_directories(${TARGET_IOTJS} PRIVATE ${IOTJS_INCLUDE_DIRS})
   target_link_libraries(${TARGET_IOTJS} ${TARGET_LIB_IOTJS})
-  install(TARGETS ${TARGET_IOTJS}
+  install(TARGETS ${TARGET_IOTJS} ${TARGET_LIB_IOTJS}
           RUNTIME DESTINATION "${INSTALL_PREFIX}/bin"
           LIBRARY DESTINATION "${INSTALL_PREFIX}/lib"
           PUBLIC_HEADER DESTINATION "${INSTALL_PREFIX}/include/iotjs")