Add Build-Tools runtime.properties file.

Change-Id: I5addf44a2ea3dbb91df5a49f6fcb10e75047fa82
diff --git a/build/sdk.atree b/build/sdk.atree
index f208218..d0c47ad 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -69,6 +69,7 @@
 
 development/sdk/sdk_files_NOTICE.txt           build-tools/${PLATFORM_NAME}/NOTICE.txt
 development/sdk/build_tools_source.properties  build-tools/${PLATFORM_NAME}/source.properties
+development/sdk/build_tools_runtime.properties build-tools/${PLATFORM_NAME}/runtime.properties
 
 # build tools from out/host/$(HOST_OS)-$(HOST_ARCH)/
 bin/aapt                                strip build-tools/${PLATFORM_NAME}/aapt
diff --git a/sdk/build_tools_runtime.properties b/sdk/build_tools_runtime.properties
new file mode 100644
index 0000000..f2fbb40
--- /dev/null
+++ b/sdk/build_tools_runtime.properties
@@ -0,0 +1,2 @@
+Runtime.Jvm=1.6
+