build: Install neard back to libexec/nfc/

Makefile.am

diff --git a/Makefile.am b/Makefile.am
index 9a11cc5..8fd6675 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -29,7 +29,8 @@
 builtin_cflags =
 builtin_libadd =
 
-sbin_PROGRAMS = src/neard
+libexecdir = @libexecdir@/nfc
+libexec_PROGRAMS = src/neard
 
 src_neard_SOURCES = $(gdbus_sources) $(gweb_sources) $(builtin_sources) \
 			src/main.c src/error.c src/near.h src/log.c \