Include windows.h instead of the MFC header afxres.h

Include windows.h instead of the MFC header afxres.h

VS 2015 RC ships without afxres.h, so fpdfsdkdll.rc fails to
compile. afxres.h is really intended for MFC apps so depending on
it is a bad idea anyway, so I changed both references to
windows.h. See http://stackoverflow.com/questions/1575559 for
some other perspective on this.

R=tsepez@chromium.org
BUG=440500
Committed: https://pdfium.googlesource.com/pdfium/+/70476c21026f533ffb916b6a7ce387639f34e696

[brucedawson, 2015-04-08 23:42:13]

After the const-comparator issue (see email) is fixed this is the last-known VS
2015 issue in pdfium.

[Tom Sepez, 2015-04-09 00:12:44]

tsepez@chromium.org changed reviewers:
+ thestig@chromium.org

[Tom Sepez, 2015-04-09 00:12:45]

Rubberstamp LGTM, otherwise maybe thestig@ has the windows expertise to actually
review this.

[brucedawson, 2015-04-09 00:23:00]

I also updated the .gitignore file. This isn't strictly necessary but it stops
git from saying this after loading the .rc file into Visual Studio:

Untracked files:
  (use "git add <file>..." to include in what will be committed)

        fpdfsdk/src/fpdfsdkdll.aps

Reasonable?

[Tom Sepez, 2015-04-09 00:27:18]

LGTM after fixing nit.

https://codereview.chromium.org/1078513002/diff/20001/.gitignore
File .gitignore (right):

https://codereview.chromium.org/1078513002/diff/20001/.gitignore#newcode24
.gitignore:24: *.aps
nit: alphabetize.

[brucedawson, 2015-04-09 00:51:35]

Alphabetization fixed. Any thoughts thestig@ on the .rc change?

[Lei Zhang, 2015-04-09 19:31:00]

If VS is putting .aps files in the source tree somehow, then sure.

[brucedawson, 2015-04-09 20:44:59]

Committed patchset #3 (id:40001) manually as
70476c21026f533ffb916b6a7ce387639f34e696 (presubmit successful).