Stop using MAP_NORESERVE on FreeBSD

See:
v8/v8@a87e1dc
https://reviews.freebsd.org/D848

This fixes #231

Author: ignisf

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### Unreleased
 
 * Dramatically reduce the binary size on macOS (thanks @aviat)
+* Fix compilation on FreeBSD 11 #231
 
 ### 3.16.14.16, 3.16.14.17 - 2016-04-28:
 

patches/do-not-use-MAP_NORESERVE-on-freebsd.patch

@@ -0,0 +1,31 @@
+diff --git a/src/platform-freebsd.cc b/src/platform-freebsd.cc
+index 62653b4ca7..a64dd98ce5 100644
+--- a/src/platform-freebsd.cc
++++ b/src/platform-freebsd.cc
+@@ -368,7 +368,7 @@ VirtualMemory::VirtualMemory(size_t size, size_t alignment)
+   void* reservation = mmap(OS::GetRandomMmapAddr(),
+                            request_size,
+                            PROT_NONE,
+-                           MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
++                           MAP_PRIVATE | MAP_ANON,
+                            kMmapFd,
+                            kMmapFdOffset);
+   if (reservation == MAP_FAILED) return;
+@@ -440,7 +440,7 @@ void* VirtualMemory::ReserveRegion(size_t size) {
+   void* result = mmap(OS::GetRandomMmapAddr(),
+                       size,
+                       PROT_NONE,
+-                      MAP_PRIVATE | MAP_ANON | MAP_NORESERVE,
++                      MAP_PRIVATE | MAP_ANON,
+                       kMmapFd,
+                       kMmapFdOffset);
+ 
+@@ -470,7 +470,7 @@ bool VirtualMemory::UncommitRegion(void* base, size_t size) {
+   return mmap(base,
+               size,
+               PROT_NONE,
+-              MAP_PRIVATE | MAP_ANON | MAP_NORESERVE | MAP_FIXED,
++              MAP_PRIVATE | MAP_ANON | MAP_FIXED,
+               kMmapFd,
+               kMmapFdOffset) != MAP_FAILED;
+ }