Add step to copy static analyzer tools.

These are shipped in the NDK, and the NDK clang is copied directly
from here.

Bug: http://b/22183733
Change-Id: If67d7fa0bacd6daf0bc9fb038e363bf683aa5634
diff --git a/update.sh b/update.sh
index e888314..0c090f1 100755
--- a/update.sh
+++ b/update.sh
@@ -13,6 +13,13 @@
   fi
 done
 
+# Copy static analyzer scripts.
+echo Copying static analyzer tools
+rm -rf tools/*
+mkdir -p tools
+cp -ar ${ANDROID_BUILD_TOP}/external/clang/tools/scan-build tools
+cp -ar ${ANDROID_BUILD_TOP}/external/clang/tools/scan-view tools
+
 # Copy libraries
 echo Copying libc++.so
 cp -a ${ANDROID_HOST_OUT}/lib/libc++.so lib/