add scripts to doxygen for subzero

docs/Doxyfile

 # Doxyfile 1.8.6
 
 # This file describes the settings to be used by the documentation system
 # doxygen (www.doxygen.org) for a project.
 #
 # All text after a double hash (##) is considered a comment and is placed in
 # front of the TAG it is preceding.
 #
 # All text after a single hash (#) is considered a comment and will be ignored.
 # The format is:
@@ skipping 731 matching lines @@
 # directories like /usr/src/myproject. Separate the files or directories with
 # spaces.
 # Note: If this tag is empty the current directory is searched.
 
 INPUT                  = "../src" \
                          "../../llvm/include/llvm/ADT" \
                          "../../llvm/include/llvm/Bitcode" \
                          "../../llvm/include/llvm/Config" \
                          "../../llvm/include/llvm/IR" \
                          "../../llvm/include/llvm/IRReader" \
-                         "../../llvm/include/llvm/Support"
+                         "../../llvm/include/llvm/Support" \
+                         "../pydir"
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
 # libiconv (or the iconv built into libc) for the transcoding. See the libiconv
 # documentation (see: http://www.gnu.org/software/libiconv) for the list of
 # possible encodings.
 # The default value is: UTF-8.
 
 INPUT_ENCODING         = UTF-8
 
@@ skipping 1562 matching lines @@
 
 CLANG_ASSISTED_PARSING = NO
 
 CLANG_OPTIONS = "-std=c++11" \
                 "-DALLOW_DUMP=1" \
                 "-DALLOW_LLVM_CL=1" \
                 "-DALLOW_LLVM_IR=1" \
                 "-DALLOW_LLVM_IR_AS_INPUT=1" \
                 "-DALLOW_MINIMAL_BUILD=0" \
                 "-DPNACL_BROWSER_TRANSLATOR=0"