Include the compiler ABI hash in the package hash

This complements the previous commit in order to fix haskell#9326

cabal-install/src/Distribution/Client/PackageHash.hs

@@ -10,6 +10,8 @@
 -- * the package tarball
 -- * the ids of all the direct dependencies
 -- * other local configuration (flags, profiling, etc)
+--
+-- See 'PackageHashInputs' for a detailed list of what determines the hash.
 module Distribution.Client.PackageHash
  ( -- * Calculating package hashes
  PackageHashInputs (..)
@@ -39,6 +41,7 @@ import Distribution.Package
  )
 import Distribution.Simple.Compiler
  ( CompilerId
+ , AbiTag(..)
  , DebugInfoLevel (..)
  , OptimisationLevel (..)
  , PackageDB
@@ -191,6 +194,7 @@ type PackageSourceHash = HashValue
 -- package hash.
 data PackageHashConfigInputs = PackageHashConfigInputs
  { pkgHashCompilerId :: CompilerId
+ , pkgHashCompilerABI :: AbiTag
  , pkgHashPlatform :: Platform
  , pkgHashFlagAssignment :: FlagAssignment -- complete not partial
  , pkgHashConfigureScriptArgs :: [String] -- just ./configure for build-type Configure
@@ -301,6 +305,7 @@ renderPackageHashInputs
  pkgHashDirectDeps
  , -- and then all the config
  entry "compilerid" prettyShow pkgHashCompilerId
+ , entry "compilerabi" prettyShow pkgHashCompilerABI
  , entry "platform" prettyShow pkgHashPlatform
  , opt "flags" mempty showFlagAssignment pkgHashFlagAssignment
  , opt "configure-script" [] unwords pkgHashConfigureScriptArgs

cabal-install/src/Distribution/Client/ProjectPlanning.hs

@@ -4303,6 +4303,7 @@ packageHashConfigInputs
 packageHashConfigInputs shared@ElaboratedSharedConfig{..} pkg =
  PackageHashConfigInputs
  { pkgHashCompilerId = compilerId pkgConfigCompiler
+ , pkgHashCompilerABI = compilerAbiTag pkgConfigCompiler
  , pkgHashPlatform = pkgConfigPlatform
  , pkgHashFlagAssignment = elabFlagAssignment
  , pkgHashConfigureScriptArgs = elabConfigureScriptArgs