[windows] use bundled libtom{crypt,math} libs

Using more recent versions seems to be a dead end; the legacy is too strong on this one.

Download and build just `zlib`.

Package.swift

@@ -17,8 +17,25 @@ let linkerSettings: [LinkerSetting]? = [
     ])
 ]
 
-let libtommathTarget = Target.systemLibrary(name: "libtommath", path: "Sources/libtommath-win")
-let libtomcryptTarget = Target.systemLibrary(name: "libtomcrypt", path: "Sources/libtomcrypt-win")
+let libtommathTarget = Target.target(name: "libtommath", cSettings: [
+    .unsafeFlags([
+        // silence
+        // Sources\libtommath\bignumshim.c:28:10: warning: 'mp_read_unsigned_bin' is deprecated: replaced by mp_from_ubin [-Wdeprecated-declarations]
+        "-Wno-deprecated-declarations"
+    ])
+])
+let libtomcryptTarget = Target.target(name: "libtomcrypt", cSettings: [
+    .unsafeFlags([
+        "-Wno-shorten-64-to-32",
+        // silence
+        // Sources\libtomcrypt\include\tomcrypt_cfg.h:27:28: warning: 'malloc' redeclared without 'dllimport' attribute: previous 'dllimport' ignored [-Winconsistent-dllimport]
+        // Sources\libtomcrypt\include\tomcrypt_cfg.h:28:28: warning: 'realloc' redeclared without 'dllimport' attribute: previous 'dllimport' ignored [-Winconsistent-dllimport]
+        "-Wno-inconsistent-dllimport",
+        // silence
+        // Sources\libtomcrypt\mac\xcbc\xcbc_file.c:55:9: warning: 'fopen' is deprecated: This function or variable may be unsafe. Consider using fopen_s instead. [-Wdeprecated-declarations]
+        "-Wno-deprecated-declarations"
+    ])
+])
 let zTarget = Target.systemLibrary(name: "Z", path: "Sources/Z-win")
 #else
 let cSettings: [CSetting]? = []

Scripts/windows/dependencies.ps1

@@ -7,10 +7,9 @@ Set-StrictMode -Version Latest
 
 $cmake = (Get-Command cmake.exe -ErrorAction Stop)
 $ninja = (Get-Command ninja.exe -ErrorAction Stop)
-$nmake = (Get-Command nmake.exe -ErrorAction Stop)
 $swift = (Get-Command swift.exe -ErrorAction Stop)
 
-$cmake,$ninja,$nmake,$swift | Format-Table -AutoSize -HideTableHeaders -Property Source 
+$cmake,$ninja,$swift | Format-Table -AutoSize -HideTableHeaders -Property Source 
 
 exec { cmake --version }
 exec { ninja --version }
@@ -30,43 +29,11 @@ function download_and_extract([string]$releaseFile, [string]$localName) {
     return $dirname
 }
 
-$mathDir  = download_and_extract 'libtom/libtommath/releases/download/v1.3.0/ltm-1.3.0.zip'      'libtommath-1.3.0'
-$cryptDir = download_and_extract 'libtom/libtomcrypt/releases/download/v1.18.2/crypt-1.18.2.zip' 'libtomcrypt-1.18.2'
-$zlibDir  = download_and_extract 'zlib-ng/zlib-ng/archive/refs/tags/2.2.2.zip'                   'zlib-ng-2.2.2'
-
-function nmake_build([string]$dir, [string]$makefile, [string[]]$nmakeArgs) {
-    Write-Host "Building ${dir} with nmake" -ForegroundColor Cyan
-
-    Push-Location $dir
-    try {
-        exec { nmake.exe /nologo -f $makefile  $nmakeArgs "" }
-    } finally {
-        Pop-Location
-    }
-}
-
-[string]$cryptArm64flags = ''
-if ($HOST_MSVC_ARCH -eq 'arm64') { 
-    # Needed because the endian detection macros do not work on arm64 in a released version.
-    # This is now fixed but no new release was made since. Avoid warnings on x64 by not overriding there.
-    # ref. https://github.com/libtom/libtomcrypt/commit/c4d22b904604f2f49c717ffc9bf86678658117b0#diff-2db5eece44c5b2ec42c2e2a08d847e6b0e3723d7d11bf7d5bda16f20fe795ff9R83
-    $cryptArm64flags = '/DENDIAN_LITTLE /DENDIAN_64BITWORD /DLTC_FAST'
-}
+$zlibDir = download_and_extract 'zlib-ng/zlib-ng/archive/refs/tags/2.2.2.zip' 'zlib-ng-2.2.2'
 
 [string]$BUNDLE_DIR = "${BIN_DIR}\deps-windows"
 clean_dir $BUNDLE_DIR
 
-nmake_build $mathDir  "makefile.msvc" @(
-    "PREFIX=${BUNDLE_DIR}"
-    'install'
-)
-nmake_build $cryptDir "makefile.msvc" @(
-    "CFLAGS=/DUSE_LTM /DLTM_DESC ${cryptArm64flags} /I${mathDir}"
-    "EXTRALIBS=${mathDir}\tommath.lib"
-    "PREFIX=${BUNDLE_DIR}"
-    'install'
-)
-
 function cmake_build_install([string]$dir, [string[]]$cmakeArgs) {
     Write-Host "Building ${dir} with cmake" -ForegroundColor Cyan