build: install into bin instead of sbin

Installs into bin instead of sbin per guidelines.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I1b764bb63d7a79b69a94f63e2c449b5e1ca5ffb8
diff --git a/Makefile.am b/Makefile.am
index cb98240..4fc8635 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-sbin_PROGRAMS = phosphor-gpio-monitor
+bin_PROGRAMS = phosphor-gpio-monitor
 
 noinst_HEADERS = monitor.hpp
 
diff --git a/gpio-util/Makefile.am b/gpio-util/Makefile.am
index 241cb19..d596362 100644
--- a/gpio-util/Makefile.am
+++ b/gpio-util/Makefile.am
@@ -1,7 +1,7 @@
 AM_DEFAULT_SOURCE_EXT = .cpp
 AM_CPPFLAGS = -iquote ${top_srcdir}
 
-sbin_PROGRAMS = \
+bin_PROGRAMS = \
 	phosphor-gpio-util
 
 phosphor_gpio_util_SOURCES = \
diff --git a/presence/Makefile.am b/presence/Makefile.am
index 6c2e564..7cbfe80 100644
--- a/presence/Makefile.am
+++ b/presence/Makefile.am
@@ -1,7 +1,7 @@
 AM_DEFAULT_SOURCE_EXT = .cpp
 AM_CPPFLAGS = -iquote ${top_srcdir}
 
-sbin_PROGRAMS = \
+bin_PROGRAMS = \
 	phosphor-gpio-presence
 
 phosphor_gpio_presence_SOURCES = \