Revert "get rid of LinearTransform"

This reverts commit bcd592053ae60e569e9b24f3f2d69b218c24d174.

Bug: 36206160
Test:  Fugu compiles, didn't before the revert
Change-Id: Id80fd4ce9db3fce03b049cf81f938187c7ddb8b0
diff --git a/libutils/Android.bp b/libutils/Android.bp
index 68ce63d..2a392b9 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -31,6 +31,7 @@
         "CallStack.cpp",
         "FileMap.cpp",
         "JenkinsHash.cpp",
+        "LinearTransform.cpp",
         "Log.cpp",
         "NativeHandle.cpp",
         "Printer.cpp",