lib: Add lib/ltp_priv.h header for internal API.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/lib/Makefile b/lib/Makefile
index 453cf95..4199520 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -28,6 +28,8 @@
 CFLAGS			+= -D_USC_LIB_
 endif
 
+CFLAGS			+= -I.
+
 #CPPFLAGS		+= -DGARRETT_IS_A_PEDANTIC_BASTARD
 
 FILTER_OUT_LIBSRCS	:= mount_utils.c