package/cryptopp: fix dos/unix newlines in patch

Fixes:
http://autobuild.buildroot.net/results/0a26265961747600388258d32ba7dc9226c9249b/



Commit 40005b9a (package/cryptopp: fix build with gcc < 4.9) added a
patch to fix building with old toolchains.  The source code unfortunately
contains a mix of DOS and UNIX newlines, and the DOS new lines got stripped
by the mailing list, causing the patch to no longer apply.

Fix up the patch manually.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>