tools: convert makefiles to kbuild style
Before this commit, makefiles under tools/ directory
were implemented with their own way.
This commit refactors them by using "hostprogs-y" variable.
Several C sources have been added to wrap other C sources
to simplify Makefile.
For example, tools/crc32.c includes lib/crc32.c
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/tools/env/env_flags.c b/tools/env/env_flags.c
new file mode 100644
index 0000000..b261cb8
--- /dev/null
+++ b/tools/env/env_flags.c
@@ -0,0 +1 @@
+#include "../../common/env_flags.c"