Disable RandomizedBaseAddress on MSVC builds

The ASLR in Windows 8/Windows 2012 can break PostgreSQL's shared memory. It
doesn't fail every time (which is explained by the Random part in ASLR), but
can fail with errors abut failing to reserve shared memory region.

MauMau, reviewed by Craig Ringer

src/tools/msvc/MSBuildProject.pm

@@ -323,6 +323,7 @@ sub WriteItemDefinitionGroup
       <ProgramDatabaseFile>.\\$cfgname\\$self->{name}\\$self->{name}.pdb</ProgramDatabaseFile>
       <GenerateMapFile>false</GenerateMapFile>
       <MapFileName>.\\$cfgname\\$self->{name}\\$self->{name}.map</MapFileName>
+      <RandomizedBaseAddress>false</RandomizedBaseAddress>
       <SubSystem>Console</SubSystem>
       <TargetMachine>$targetmachine</TargetMachine>
 EOF

src/tools/msvc/VCBuildProject.pm

@@ -190,6 +190,7 @@ EOF
 		StackReserveSize="4194304" DisableSpecificWarnings="$self->{disablewarnings}"
 		GenerateDebugInformation="TRUE" ProgramDatabaseFile=".\\$cfgname\\$self->{name}\\$self->{name}.pdb"
 		GenerateMapFile="FALSE" MapFileName=".\\$cfgname\\$self->{name}\\$self->{name}.map"
+		RandomizedBaseAddress="FALSE"
 		SubSystem="1" TargetMachine="$targetmachine"
 EOF
 	if ($self->{disablelinkerwarnings})