Move GLES unit tests

GLES unit tests were in the generic "unittests" directory.
In order to avoid confusion with Vulkan unit tests, the
GLES unit tests directory was renamed to GLESUnitTests.

Change-Id: Idc40f63daddc6f822207fc4a75dd037a46ae22a6
Reviewed-on: https://swiftshader-review.googlesource.com/c/21628
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/Android.mk b/Android.mk
index bccaf14..5165436 100644
--- a/Android.mk
+++ b/Android.mk
@@ -63,7 +63,7 @@
 
 ifneq ($(swiftshader_unsupported_build),true)
 include $(swiftshader_root)/src/Android.mk
-include $(swiftshader_root)/tests/unittests/Android.mk
+include $(swiftshader_root)/tests/GLESUnitTests/Android.mk
 ifeq ($(REACTOR_LLVM_VERSION),3)
 include $(swiftshader_root)/third_party/LLVM/Android.mk
 else