ANDROID: lib: Export show_mem() for vendor module usage

There are debugging modules that monitor the memory usage of tasks
and report memory parameters in some situations (such as OOM).

Bug: 189595202
Change-Id: I6cc405b0f4cbe1706857fc3b2f8da83ea981818d
Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com>

lib/show_mem.c

@@ -43,3 +43,4 @@ void show_mem(unsigned int filter, nodemask_t *nodemask)
 #endif
 	trace_android_vh_show_mem(filter, nodemask);
 }
+EXPORT_SYMBOL_GPL(show_mem);