More libunwind compilation fixes

headers/libs/libunwind/libunwind-x86.h

@@ -32,7 +32,11 @@ extern "C" {
 
 #include <sys/types.h>
 #include <inttypes.h>
-#include <ucontext.h>
+#ifndef __HAIKU__
+# include <ucontext.h>
+#else
+# include <signal.h>
+#endif
 
 #define UNW_TARGET      x86
 #define UNW_TARGET_X86  1

headers/libs/libunwind/libunwind-x86_64.h

@@ -34,7 +34,11 @@ extern "C" {
 
 #include <sys/types.h>
 #include <inttypes.h>
-#include <ucontext.h>
+#ifndef __HAIKU__
+# include <ucontext.h>
+#else
+# include <signal.h>
+#endif
 
 #define UNW_TARGET              x86_64
 #define UNW_TARGET_X86_64       1

src/libs/libunwind/x86/Ginit.c

@@ -25,7 +25,7 @@ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
 #ifdef HAVE_CONFIG_H
-#include <config.h>
+#include "config.h"
 #endif
 
 #include <stdlib.h>