docs: add a status for know issues

As time passes, a known issues can be no longer applicable (because
the component has been fixed, or a workaround ahs been added in the
crosstool-NG scripts/config...).

Some may also be unconfirmed, with no way to easily trigger the error,
or applies to old versions of components...

Add a status for every known issues.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

docs/B - Known issues.txt

@@ -27,6 +27,17 @@ The following dummy section explains it all.
       happens, what has been investigated so far, and possible orientations
       as how to try to solve this (eg. URLs, code snippets...).
 
+    Status:
+      Tells about the status of the issue:
+        UNCONFIRMED : missing information, or unable, to reproduce, but there
+                      is consensus that there is an issue somewhere...
+        CURRENT     : the issue is applicable.
+        DEPRECATED  : the issue used to apply in some cases, but has not been
+                      confirmed or reported again lately.
+        CLOSED      : the issue is no longer valid, and a fix has been added
+                      either as a patch to this component, and/or as a
+                      workaround in the scripts and/or the configuration.
+
     Fix:
       What you have to do to fix it, if at all possible.
       The fact that there is a fix, and yet this is a known issue means that
@@ -53,6 +64,9 @@ Explanations:
   A possible fix could probably set the environment variable CCACHE_CC to the
   actual compiler used.
 
+Status:
+  CURRENT
+
 Fix:
   None known.
 
@@ -68,6 +82,9 @@ Explanations:
   case-sensitive. You have to use so-called "managed" mounts. See:
   http://cygwin.com/faq.html section 4, question 32.
 
+Status:
+  DEPRECATED
+
 Fix:
   Use "managed" mounts for the directories where you build *and* install your
   toolchains.
@@ -83,6 +100,9 @@ Explanations:
   With uClibc, it is possible to build a cross-ldd. Unfortunately, it is
   not (currently) possible to build this cross-ldd under Cygwin.
 
+Status:
+  DEPRECATED
+
 Fix:
   None so far.
 
@@ -100,6 +120,9 @@ Explanations:
   core gcc is not located in the same place it is located when building
   with shared companion libraries.
 
+Status:
+  DEPRECATED
+
 Fix:
   None so far.
 
@@ -120,6 +143,9 @@ Explanations:
   will not be built. There is nothing to be worry about (unless you do
   want to build the Fortran frontend, of course).
 
+Status:
+  CURRENT
+
 Fix:
   None so far. It's a spurious error, so there will probably never be
   a fix for this issue.
@@ -137,6 +163,9 @@ Explanations:
   need sjlj. On some architectures, gcc is unable to determine whether
   sjlj are needed or not.
 
+Status:
+  CURRENT
+
 Fix:
   None so far.
 
@@ -154,6 +183,9 @@ Explanations:
   of glibc (and possibly eglibc as well) on some architectures
   (seen on powerpc, s390, s390x and x86_64).
 
+Status:
+  CURRENT
+
 Fix:
   None so far. It would require some glibc hacking.