Dont search hardcoded paths, we might be doing a cross-build
Use '=' in-front to let compiler append sysroot, if it can

Should fix things like

configure:6972: arm-angstrom-linux-gnueabi-gcc  -march=armv7-a -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a8 -DNDEBUG -fno-inline -D__SOFTFP__ --sysroot=/build/v2013.06/build/tmp-angstrom_v2013_06-eglibc/sysroots/beaglebone -c -O2 -pipe -g -feliminate-unused-debug-types  -I/usr/include/ncursesw conftest.c >&5
cc1: warning: include location "/usr/include/ncursesw" is unsafe for cross-compilation [-Wpoison-system-directories]


Signed-off-by: Khem Raj
Upstream-Status: Pending


Index: Python-3.3.2/setup.py
===================================================================
--- Python-3.3.2.orig/setup.py	2013-07-30 01:30:48.000000000 -0700
+++ Python-3.3.2/setup.py	2013-07-30 01:41:11.697862723 -0700
@@ -1210,7 +1210,7 @@
         panel_library = 'panel'
         if curses_library == 'ncursesw':
             curses_defines.append(('HAVE_NCURSESW', '1'))
-            curses_includes.append('/usr/include/ncursesw')
+            curses_includes.append('=/usr/include/ncursesw')
             # Bug 1464056: If _curses.so links with ncursesw,
             # _curses_panel.so must link with panelw.
             panel_library = 'panelw'
@@ -1819,7 +1819,7 @@
         if host_platform == 'darwin':
             # OS X 10.5 comes with libffi.dylib; the include files are
             # in /usr/include/ffi
-            inc_dirs.append('/usr/include/ffi')
+            inc_dirs.append('=/usr/include/ffi')
 
         ffi_inc = [sysconfig.get_config_var("LIBFFI_INCLUDEDIR")]
         if not ffi_inc or ffi_inc[0] == '':