scripts: Use getcwd from Cwd instead of POSIX

scripts/Dpkg/Source/Package/V1.pm

@@ -32,7 +32,8 @@ use Dpkg::Exit;
 use Dpkg::Source::Functions qw(erasedir);
 use Dpkg::Source::Package::V3::native;
 
-use POSIX;
+use POSIX qw(!getcwd);
+use Cwd;
 use File::Basename;
 use File::Temp qw(tempfile);
 use File::Spec;

scripts/Dpkg/Source/Package/V2.pm

@@ -34,7 +34,8 @@ use Dpkg::Vendor qw(run_vendor_hook);
 use Dpkg::Control;
 use Dpkg::Changelog::Parse;
 
-use POSIX;
+use POSIX qw(!getcwd);
+use Cwd;
 use File::Basename;
 use File::Temp qw(tempfile tempdir);
 use File::Path;

scripts/Dpkg/Source/Package/V3/native.pm

@@ -30,7 +30,7 @@ use Dpkg::Exit;
 use Dpkg::Source::Archive;
 use Dpkg::Source::Functions qw(erasedir);
 
-use POSIX;
+use Cwd;
 use File::Basename;
 use File::Temp qw(tempfile);