Merge from src:

lld: accept EINVAL to indicate posix_fallocate is unsupported

As of r325320 posix_fallocate on a ZFS filesystem returns EINVAL to
indicate that the operation is not supported. (I think this is a strange
choice of errno on the part of POSIX.)

PR:		223383, 223440
Reported by:	Mark Millard

devel/llvm50/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	llvm
 DISTVERSION=	5.0.0
-PORTREVISION=	4
+PORTREVISION=	5
 CATEGORIES=	devel lang
 MASTER_SITES=	http://llvm.org/${PRE_}releases/${LLVM_RELEASE}/${RCDIR}
 PKGNAMESUFFIX=	${LLVM_SUFFIX}

devel/llvm50/files/patch-lib_Support_Unix_Path.inc

@@ -0,0 +1,11 @@
+--- lib/Support/Unix/Path.inc.orig
++++ lib/Support/Unix/Path.inc
+@@ -427,7 +427,7 @@
+   // If we have posix_fallocate use it. Unlike ftruncate it always allocates
+   // space, so we get an error if the disk is full.
+   if (int Err = ::posix_fallocate(FD, 0, Size)) {
+-    if (Err != EOPNOTSUPP)
++    if (Err != EINVAL && Err != EOPNOTSUPP)
+       return std::error_code(Err, std::generic_category());
+   }
+ #endif