Add Debian package version to "hung task" log messages

I noticed a couple of bug reports with these messages and unknown
packge version.

debian/changelog

@@ -413,6 +413,7 @@ linux (4.9.30-1) UNRELEASED; urgency=medium
   * uapi: fix linux/if.h userspace compilation errors (see #822393, #824442)
   * debian/control: Fix compiler build-dependencies for cross-building
     (Closes: #863907)
+  * Add Debian package version to "hung task" log messages
 
   [ Salvatore Bonaccorso ]
   * tracing: Use strlcpy() instead of strcpy() in __trace_find_cmdline()

debian/patches/debian/version.patch

@@ -99,7 +99,7 @@ are set.
  
  #include <asm/pgtable.h>
  #include <asm/io.h>
-@@ -1340,8 +1341,9 @@ void show_regs(struct pt_regs * regs)
+@@ -1359,8 +1360,9 @@ void show_regs(struct pt_regs * regs)
  
  	printk("NIP: "REG" LR: "REG" CTR: "REG"\n",
  	       regs->nip, regs->link, regs->ctr);
@@ -111,6 +111,30 @@ are set.
  	printk("MSR: "REG" ", regs->msr);
  	print_msr_bits(regs->msr);
  	printk("  CR: %08lx  XER: %08lx\n", regs->ccr, regs->xer);
+--- a/kernel/hung_task.c
++++ b/kernel/hung_task.c
+@@ -17,6 +17,7 @@
+ #include <linux/sysctl.h>
+ #include <linux/utsname.h>
+ #include <trace/events/sched.h>
++#include <generated/package.h>
+ 
+ /*
+  * The number of tasks checked:
+@@ -109,10 +110,11 @@ static void check_hung_task(struct task_
+ 		sysctl_hung_task_warnings--;
+ 		pr_err("INFO: task %s:%d blocked for more than %ld seconds.\n",
+ 			t->comm, t->pid, timeout);
+-		pr_err("      %s %s %.*s\n",
++		pr_err("      %s %s %.*s%s\n",
+ 			print_tainted(), init_utsname()->release,
+ 			(int)strcspn(init_utsname()->version, " "),
+-			init_utsname()->version);
++			init_utsname()->version,
++			LINUX_PACKAGE_ID);
+ 		pr_err("\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\""
+ 			" disables this message.\n");
+ 		sched_show_task(t);
 --- a/kernel/printk/printk.c
 +++ b/kernel/printk/printk.c
 @@ -45,6 +45,7 @@