build: install into bin instead of sbin

Installs swampd and setsensor into bin instead of sbin per guidelines.

Warning: Every platform requires its own service file, please update
your service file when you pick up this change.

Change-Id: Ib7fe057d8758a8851049e88d41d13ca80b0b9862
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/Makefile.am b/Makefile.am
index 9583fac..9375ea6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -38,7 +38,7 @@
 AM_CFLAGS = $(CODE_COVERAGE_CFLAGS)
 AM_CXXFLAGS = $(CODE_COVERAGE_CXXFLAGS)
 
-sbin_PROGRAMS = swampd setsensor
+bin_PROGRAMS = swampd setsensor
 
 setsensor_SOURCES = setsensor.cpp
 setsensor_LDADD = \