Add single crunch command to aapt.

Previously the crunch command would work on a full res folder
and output a full res folder (with only the drawables). This
was only used in the SDK.

The incremental logic is moved to the SDK build system so we
change the crunch command (or rather add a new one) to only
crunch a single file.

Change-Id: I635ee3e871d035b9db2fb593802d914e48241abf
diff --git a/tools/aapt/Command.cpp b/tools/aapt/Command.cpp
index 0a5e590..b98925b 100644
--- a/tools/aapt/Command.cpp
+++ b/tools/aapt/Command.cpp
@@ -7,6 +7,7 @@
 #include "Bundle.h"
 #include "ResourceFilter.h"
 #include "ResourceTable.h"
+#include "Images.h"
 #include "XMLNode.h"
 
 #include <utils/Log.h>
@@ -1839,6 +1840,21 @@
     return NO_ERROR;
 }
 
+/*
+ * Do PNG Crunching on a single flag
+ *  -i points to a single png file
+ *  -o points to a single png output file
+ */
+int doSingleCrunch(Bundle* bundle)
+{
+    fprintf(stdout, "Crunching single PNG file: %s\n", bundle->getSingleCrunchInputFile());
+    fprintf(stdout, "\tOutput file: %s\n", bundle->getSingleCrunchOutputFile());
+
+    String8 input(bundle->getSingleCrunchInputFile());
+    String8 output(bundle->getSingleCrunchOutputFile());
+    return preProcessImageToCache(bundle, input, output);
+}
+
 char CONSOLE_DATA[2925] = {
     32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
     32, 32, 32, 32, 32, 32, 32, 95, 46, 32, 32, 32, 32, 32, 32, 32, 32, 32,