mksh: fix ulimit.

In the absence of the correct #define, mksh was falling back to a trivial
internal list of limits (that doubly annoyingly wasn't reflected in the
usage output).

Bug: http://b/281900697
Test: ulimit -a
(cherry picked from https://android-review.googlesource.com/q/commit:3c75470b2730985cfd83a4c0d83a3f7e81e7c2f8)
Merged-In: I89a157db76cd69c2cc2c9e4a8a8c67364a7a6c4b
Change-Id: I89a157db76cd69c2cc2c9e4a8a8c67364a7a6c4b
diff --git a/Android.bp b/Android.bp
index a300947..ca930d0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -59,11 +59,11 @@
         "-DMKSH_DONT_EMIT_IDSTRING",
         "-DKSH_VERSIONNAME_VENDOR_EXT=\" Android\"",
 
-        // ...and the defines from Build.sh.
+        // ...and the defines from src/Rebuild.sh after running src/Build.sh.
         "-DMKSH_BUILDSH",
         "-D_GNU_SOURCE",
         "-DSETUID_CAN_FAIL_WITH_EAGAIN",
-        "-DHAVE_STRING_POOLING=1",
+        "-DHAVE_STRING_POOLING=2",
         "-DHAVE_ATTRIBUTE_BOUNDED=1",
         "-DHAVE_ATTRIBUTE_FORMAT=1",
         "-DHAVE_ATTRIBUTE_NORETURN=1",
@@ -96,13 +96,14 @@
         "-DHAVE_CAN_UCBINTS=1",
         "-DHAVE_CAN_INT8TYPE=1",
         "-DHAVE_CAN_UCBINT8=1",
-        "-DHAVE_RLIM_T=1",
         "-DHAVE_SIG_T=1",
         "-DHAVE_SYS_ERRLIST=0",
         "-DHAVE_SYS_SIGNAME=1",
         "-DHAVE_SYS_SIGLIST=1",
         "-DHAVE_FLOCK=1",
         "-DHAVE_LOCK_FCNTL=1",
+        "-DHAVE_RLIMIT=1",
+        "-DHAVE_RLIM_T=1",
         "-DHAVE_GETRUSAGE=1",
         "-DHAVE_GETSID=1",
         "-DHAVE_GETTIMEOFDAY=1",
@@ -119,12 +120,14 @@
         "-DHAVE_SETRESUGID=1",
         "-DHAVE_SETGROUPS=1",
         "-DHAVE_STRERROR=1",
-        "-DHAVE_STRSIGNAL=0",
+        "-DHAVE_STRSIGNAL=1",
         "-DHAVE_STRLCPY=1",
         "-DHAVE_FLOCK_DECL=1",
         "-DHAVE_REVOKE_DECL=1",
         "-DHAVE_SYS_ERRLIST_DECL=0",
         "-DHAVE_SYS_SIGLIST_DECL=1",
+        "-DHAVE_ST_MTIM=1",
+        "-DHAVE_ST_MTIMENSEC=0",
         "-DHAVE_PERSISTENT_HISTORY=0",
         "-DMKSH_BUILD_R=593",