Fix Dr. Heapstat documentation build error

Commit log for first patchset:
---------------
Fix Dr. Heapstat documentation build error

- remove reference from drfuzz.dox to page_fuzzer because page_fuzzer is
  build on Dr. Memory only
---------------

[zhaoqin, 2016-01-25 20:15:19]

Commit log for latest patchset:
---------------
Fix Dr. Heapstat documentation build error

- remove reference from drfuzz.dox to page_fuzzer because page_fuzzer is
  build on Dr. Memory only

Review-URL: https://codereview.appspot.com/284340043
---------------

[bruening, 2016-01-25 20:28:05]

https://codereview.appspot.com/284340043/diff/20001/drfuzz/drfuzz.dox
File drfuzz/drfuzz.dox (left):

https://codereview.appspot.com/284340043/diff/20001/drfuzz/drfuzz.dox#oldcode40
drfuzz/drfuzz.dox:40: implement the Dr. Memory \ref page_fuzzer.
Can we have \if TOOL_DRMEMORY ... \else ... \endif instead?  TOOL_DRMEMORY would
be set in ENABLED_SECTIONS via CMake_doxyfile.cmake based on toolname or a new
param.

It seems like the docs should be combined, w/ drheap not built as part of drmem
yet b/c we don't support it, but drmem built as part of drheap, if that's easier
than adding the \if support.  It probably isn't -- prob best to not try it.

[zhaoqin, 2016-01-25 21:16:55]

https://codereview.appspot.com/284340043/diff/20001/drfuzz/drfuzz.dox
File drfuzz/drfuzz.dox (left):

https://codereview.appspot.com/284340043/diff/20001/drfuzz/drfuzz.dox#oldcode40
drfuzz/drfuzz.dox:40: implement the Dr. Memory \ref page_fuzzer.
On 2016/01/25 20:28:05, bruening wrote:
> Can we have \if TOOL_DRMEMORY ... \else ... \endif instead?  TOOL_DRMEMORY
would
> be set in ENABLED_SECTIONS via CMake_doxyfile.cmake based on toolname or a new
> param.
> 
> It seems like the docs should be combined, w/ drheap not built as part of
drmem
> yet b/c we don't support it, but drmem built as part of drheap, if that's
easier
> than adding the \if support.  It probably isn't -- prob best to not try it.

Done.

The end result is not perfect because the Dr. Heapstat is used instead of Dr.
Memory:
"Dr. Fuzz is part of the Dr. Heapstat Framework. Dr. Fuzz is used to implement
the Dr. Heapstat test fuzzing mode."

I tried to correct it, including only print those two sentences \if
TOOL_DR_MEMORY.
But it seems this is really fragile, keeps getting error msg:
warning: End of list marker found without any preceding list items

I do not waste too much time on it (probably already too much).

[zhaoqin, 2016-01-25 21:23:11]

Commit log for latest patchset:
---------------
Fix Dr. Heapstat documentation build error

- add conditional reference from drfuzz.dox to page_fuzzer
  because page_fuzzer is build on Dr. Memory only

Review-URL: https://codereview.appspot.com/284340043
---------------

[bruening, 2016-01-25 21:44:58]

It seems better to exclude the whole sentence but like you said if doxygen is
not working well then LGTM

[zhaoqin, 2016-01-25 22:40:47]

Committed as
https://github.com/DynamoRIO/drmemory/commit/8bf3c135b5e165817a3e144130f65562...

Final commit log: 
---------------
Fix Dr. Heapstat documentation build error

- add conditional reference from drfuzz.dox to page_fuzzer
  because page_fuzzer is build on Dr. Memory only

Review-URL: https://codereview.appspot.com/284340043
---------------