gdbc6x: Update for gcc v14 support

One of the changes in gcc v14 is making implicit-function-declaration an
error.  For some older software packages the easiest fix is to add
-fpermissive to the compile line.

Signed-off-by: Ryan Eatmon <reatmon@ti.com>

meta-ti-extras/recipes-devtools/gdbc6x/gdbc6x_git.bb

@@ -19,7 +19,7 @@ S = "${WORKDIR}/git/gdbc6x"
 inherit update-rc.d
 inherit gettext
 
-CFLAGS += "-fcommon"
+CFLAGS += "-fcommon -fpermissive"
 
 do_configure () {
     cd ${S}