Added in wait for attach context flag.

Added in a small flag which is  passed to the context from the Java/C++ API
which causes the context to delay execution until a debugger is a attached.
This gives time to the developer to attach a debugger to the process before
the kernel is executed.

Change-Id: I5bb8e75100436920f9e1a0f414f3b0bcf0d2b439
Signed-off-by: Stephen McGroarty <stephen@codeplay.com>
diff --git a/rsDefines.h b/rsDefines.h
index fdb0720..a8957a8 100644
--- a/rsDefines.h
+++ b/rsDefines.h
@@ -252,7 +252,8 @@
 enum RsContextFlags {
     RS_CONTEXT_SYNCHRONOUS      = 0x0001,
     RS_CONTEXT_LOW_LATENCY      = 0x0002,
-    RS_CONTEXT_LOW_POWER        = 0x0004
+    RS_CONTEXT_LOW_POWER        = 0x0004,
+    RS_CONTEXT_WAIT_FOR_ATTACH  = 0x0008
 };
 
 enum RsBlasTranspose {