[build] Override dh_shlibdeps' determination of the libc version needed.

There is no libc.pc in the sysroot.

TEST=host newer than jammy
Change-Id: Ia8ce4edf4a6587bb229b4cc87b72b13f026613d0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/434940
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
diff --git a/tools/debian_package/debian/control b/tools/debian_package/debian/control
index 94d45b4..7dc5740 100644
--- a/tools/debian_package/debian/control
+++ b/tools/debian_package/debian/control
@@ -7,5 +7,5 @@
 
 Package: dart
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}
+Depends: ${misc:Depends}, libc6 (>= 2.31)
 Description: Dart SDK