llvm: unbreak native musl build (lldb): needs fcntl.h for O_RDWR.

srcpkgs/llvm/files/patches/lldb/fix-musl.patch

@@ -0,0 +1,10 @@
+--- source/Core/ConnectionSharedMemory.cpp.orig	2015-05-07 10:52:36.554392575 +0200
++++ source/Core/ConnectionSharedMemory.cpp	2015-05-07 10:52:51.674373757 +0200
+@@ -16,6 +16,7 @@
+ #ifdef _WIN32
+ #include "lldb/Host/windows/windows.h"
+ #else
++#include <fnctl.h>	/* O_RDRW */
+ #include <sys/file.h>
+ #include <sys/mman.h>
+ #include <sys/stat.h>

srcpkgs/llvm/template

@@ -53,6 +53,11 @@ post_extract() {
 		patch -sNp0 -i ${i}
 	done
 
+	cd ${XBPS_BUILDDIR}/lldb-${version}.src
+	for i in ${FILESDIR}/patches/lldb/*.patch; do
+		patch -sNp0 -i ${i}
+	done
+
 	# Move clang files into the llvm source.
 	if [ -d ${XBPS_BUILDDIR}/cfe-${version}.src ]; then
 		mv ${XBPS_BUILDDIR}/cfe-${version}.src ${wrksrc}/tools/clang