python-pycrypto: do not include host headers

This commit adds a patch to python-pycrypto that removes /usr/include
for the headers path, which is wrong when cross-compiling.

Fixes:

  http://autobuild.buildroot.org/results/5bf/5bf5e31c485a4ee8c0b0a5721205f0fed9b5ae5d/build-end.log

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pycrypto/python-pycrypto-0001-remove-incorrect-header-path.patch

@@ -0,0 +1,21 @@
+Do not use /usr/include for headers
+
+Using /usr/include is wrong when doing cross-compilation, so get rid
+of it, and rely on the compiler to use the appropriate default paths
+for headers.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+
+Index: b/setup.py
+===================================================================
+--- a/setup.py
++++ b/setup.py
+@@ -370,7 +370,7 @@
+       'ext_modules': plat_ext + [
+             # _fastmath (uses GNU mp library)
+             Extension("Crypto.PublicKey._fastmath",
+-                      include_dirs=['src/','/usr/include/'],
++                      include_dirs=['src/'],
+                       libraries=['gmp'],
+                       sources=["src/_fastmath.c"]),
+