Switch to toybox uptime.

Now we're manually editing .config because we gave up on the repeated
breakage running the script on the host, we don't need to have a fake
<shadow.h>, and we can fix uptime so we don't need a <utmpx.h> either.

Change-Id: If371bb85bd44fec01362f7fbbbfc392bd2cdfe29

.config

@@ -8,8 +8,8 @@ CONFIG_TOYBOX_FIFREEZE=y
 CONFIG_TOYBOX_FORK=y
 CONFIG_TOYBOX_ICONV=y
 CONFIG_TOYBOX_ON_ANDROID=y
-CONFIG_TOYBOX_SHADOW=y
-CONFIG_TOYBOX_UTMPX=y
+# CONFIG_TOYBOX_SHADOW is not set
+# CONFIG_TOYBOX_UTMPX is not set
 
 #
 # Posix commands
@@ -255,7 +255,7 @@ CONFIG_TAC=y
 CONFIG_TASKSET=y
 CONFIG_TIMEOUT=y
 CONFIG_TRUNCATE=y
-# CONFIG_UPTIME is not set
+CONFIG_UPTIME=y
 CONFIG_USLEEP=y
 CONFIG_VCONFIG=y
 CONFIG_VMSTAT=y

Android.mk

@@ -125,6 +125,7 @@ LOCAL_SRC_FILES := \
     toys/other/taskset.c \
     toys/other/timeout.c \
     toys/other/truncate.c \
+    toys/other/uptime.c \
     toys/other/usleep.c \
     toys/other/vconfig.c \
     toys/other/vmstat.c \
@@ -343,6 +344,7 @@ ALL_TOOLS := \
     uname \
     uniq \
     unix2dos \
+    uptime \
     usleep \
     vmstat \
     wc \

generated/config.h

@@ -10,10 +10,10 @@
 #define USE_TOYBOX_ICONV(...) __VA_ARGS__
 #define CFG_TOYBOX_ON_ANDROID 1
 #define USE_TOYBOX_ON_ANDROID(...) __VA_ARGS__
-#define CFG_TOYBOX_SHADOW 1
-#define USE_TOYBOX_SHADOW(...) __VA_ARGS__
-#define CFG_TOYBOX_UTMPX 1
-#define USE_TOYBOX_UTMPX(...) __VA_ARGS__
+#define CFG_TOYBOX_SHADOW 0
+#define USE_TOYBOX_SHADOW(...)
+#define CFG_TOYBOX_UTMPX 0
+#define USE_TOYBOX_UTMPX(...)
 #define CFG_BASENAME 1
 #define USE_BASENAME(...) __VA_ARGS__
 #define CFG_CAL 1
@@ -480,8 +480,8 @@
 #define USE_TIMEOUT(...) __VA_ARGS__
 #define CFG_TRUNCATE 1
 #define USE_TRUNCATE(...) __VA_ARGS__
-#define CFG_UPTIME 0
-#define USE_UPTIME(...)
+#define CFG_UPTIME 1
+#define USE_UPTIME(...) __VA_ARGS__
 #define CFG_USLEEP 1
 #define USE_USLEEP(...) __VA_ARGS__
 #define CFG_VCONFIG 1