Add rsForEachInternal

Bug: 23535985

Added a compiler intrinsic rsParallelFor to the runtime API, which
is translated into an internal API (rsForEachInternal) by slang.

Added a test to RsTest (for native) and RSTest_CompatLib
(for support).

Enhanced the auto api generator to handle ellipsis argument,
intrinsics, internal-only APIs, and special level for API under
development.

Change-Id: I6e2cf3db868f426aa8e0b9a77732b66c1e6b9f03
diff --git a/api/generate.sh b/api/generate.sh
index 3ff882f..55d3f04 100755
--- a/api/generate.sh
+++ b/api/generate.sh
@@ -50,7 +50,7 @@
   do
     mv slangtest/all$i.rs ../../compile/slang/tests/P_all_api_$i
 done
-rmdir slangtest
+rm -rf slangtest
 
 mv RSStubsWhiteList.cpp ../../compile/libbcc/lib/Renderscript/