programs/unixbench/pkg/unixbench.patch: resolve "Dc: sqrt(2) to 99 decimal places"

Original UnixBench dc command in dc.dat returns exitcode 1 in
current Debian dc versions. This shows as error:
Run: "Dc: sqrt(2) to 99 decimal places": Bad wait status: 0x100; aborting

Removing the last 'q' from the dc command gives same output with exit 0.
Add the dc.dat change to unixbench.patch and re-enable dc tests.

Link: https://unix.stackexchange.com/questions/733264/why-does-the-dc-command-exit1-when-using-quit
Signed-off-by: Tomi Sarvela <tomi.p.sarvela@intel.com>
Signed-off-by: Philip Li <philip.li@intel.com>

Author: tsarvela

jobs/unixbench.yaml

@@ -34,7 +34,7 @@ unixbench:
     - double
     - arithoh
     - C
-    # - dc # Run: "Dc: sqrt(2) to 99 decimal places": Bad wait status: 0x100; aborting
+    - dc
     - hanoi
     - grep
     - sysexec

programs/unixbench/pkg/unixbench.patch

@@ -75,3 +75,14 @@ index 41637bea160e..1b80c378dc1b 100755
      my $systemInfo = getSystemInfo($verbose);
 
      # If the number of copies to run was not set, set it to 1
+diff --git a/UnixBench/testdir/dc.dat b/UnixBench/testdir/dc.dat
+index dbb8f76d0e43..e7bdc3851c87 100644
+--- a/UnixBench/testdir/dc.dat
++++ b/UnixBench/testdir/dc.dat
+@@ -3,6 +3,5 @@ k
+ 2
+ v
+ p
+-q
+ [ calculate the sqrt(2) to 99 decimal places ... John Lions Test ]
+ [ $Header: dc.dat,v 1.1 87/06/22 14:28:28 kjmcdonell Beta $ ]