bonic: libc: cpuacct support for setuid functions

Any of the setuid functions now updates /acct/uid/ with its own tid
before changing users. This is so we can properly account for cpu time
per uid.

Change-Id: I34186cf4d5228cac8439e582a9e26c01ef3011e4
Signed-off-by: Mike Chan <mike@android.com>
diff --git a/libc/Android.mk b/libc/Android.mk
index e820b60..97f4011 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -47,7 +47,10 @@
 	unistd/sbrk.c \
 	unistd/send.c \
 	unistd/setegid.c \
+	unistd/setuid.c \
 	unistd/seteuid.c \
+	unistd/setreuid.c \
+	unistd/setresuid.c \
 	unistd/setpgrp.c \
 	unistd/sigblock.c \
 	unistd/siginterrupt.c \
@@ -219,6 +222,7 @@
 	bionic/__errno.c \
 	bionic/__set_errno.c \
 	bionic/_rand48.c \
+	bionic/cpuacct.c \
 	bionic/arc4random.c \
 	bionic/basename.c \
 	bionic/basename_r.c \