Change INTERFACE to PUBLIC in target_include_directories (NOAA-EMC#351)

Included directories should be marked as PUBLIC so that the build includes the module directory.

INTERFACE means to only apply it only to libraries that consume the target, but UPP itself should also include its modules.

sorc/ncep_post.fd/CMakeLists.txt

@@ -193,7 +193,7 @@ add_library(${PROJECT_NAME}::${LIBNAME} ALIAS ${LIBNAME})
 set_target_properties(${LIBNAME} PROPERTIES Fortran_MODULE_DIRECTORY
                                             ${module_dir})
 
-target_include_directories(${LIBNAME} INTERFACE
+target_include_directories(${LIBNAME} PUBLIC
   $<BUILD_INTERFACE:${module_dir}>
   $<INSTALL_INTERFACE:include>)